chore: update test fixtures and frontend for UUID identity (refs #217)

Backend test fixtures:
- Replace auth0|xxx format with UUID in all test userId values
- Update admin tests for new id/userProfileId schema
- Add missing deletionRequestedAt/deletionScheduledFor to auth test mocks
- Fix admin integration test supertest usage (app.server)

Frontend:
- AdminUser type: auth0Sub -> id + userProfileId
- admin.api.ts: all user management methods use userId (UUID) params
- useUsers/useAdmins hooks: auth0Sub -> userId/id in mutations
- AdminUsersPage + AdminUsersMobileScreen: user.auth0Sub -> user.id
- Remove encodeURIComponent (UUIDs don't need encoding)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

backend/src/_system/migrations/run-all.ts

@@ -31,6 +31,7 @@ const MIGRATION_ORDER = [
   'features/audit-log',         // Centralized audit logging; independent
   'features/ownership-costs',   // Depends on vehicles and documents; TCO recurring costs
   'features/subscriptions',     // Stripe subscriptions; depends on user-profile, vehicles
+  'core/identity-migration',    // Cross-cutting UUID migration; must run after all feature tables exist
 ];
 
 // Base directory where migrations are copied inside the image (set by Dockerfile)

backend/src/core/identity-migration/migrations/001_migrate_user_id_to_uuid.sql

@@ -0,0 +1,382 @@
+-- Migration: 001_migrate_user_id_to_uuid.sql
+-- Feature: identity-migration (cross-cutting)
+-- Description: Migrate all user identity columns from VARCHAR(255) storing auth0_sub
+--              to UUID referencing user_profiles.id. Admin tables restructured with UUID PKs.
+-- Requires: All feature tables must exist (runs last in MIGRATION_ORDER)
+
+BEGIN;
+
+-- ============================================================================
+-- PHASE 1: Add new UUID columns alongside existing VARCHAR columns
+-- ============================================================================
+
+-- 1a. Feature tables (17 tables with user_id VARCHAR)
+ALTER TABLE vehicles ADD COLUMN IF NOT EXISTS user_profile_id UUID;
+ALTER TABLE fuel_logs ADD COLUMN IF NOT EXISTS user_profile_id UUID;
+ALTER TABLE maintenance_records ADD COLUMN IF NOT EXISTS user_profile_id UUID;
+ALTER TABLE maintenance_schedules ADD COLUMN IF NOT EXISTS user_profile_id UUID;
+ALTER TABLE documents ADD COLUMN IF NOT EXISTS user_profile_id UUID;
+ALTER TABLE notification_logs ADD COLUMN IF NOT EXISTS user_profile_id UUID;
+ALTER TABLE user_notifications ADD COLUMN IF NOT EXISTS user_profile_id UUID;
+ALTER TABLE user_preferences ADD COLUMN IF NOT EXISTS user_profile_id UUID;
+ALTER TABLE saved_stations ADD COLUMN IF NOT EXISTS user_profile_id UUID;
+ALTER TABLE audit_logs ADD COLUMN IF NOT EXISTS user_profile_id UUID;
+ALTER TABLE ownership_costs ADD COLUMN IF NOT EXISTS user_profile_id UUID;
+ALTER TABLE email_ingestion_queue ADD COLUMN IF NOT EXISTS user_profile_id UUID;
+ALTER TABLE pending_vehicle_associations ADD COLUMN IF NOT EXISTS user_profile_id UUID;
+ALTER TABLE subscriptions ADD COLUMN IF NOT EXISTS user_profile_id UUID;
+ALTER TABLE donations ADD COLUMN IF NOT EXISTS user_profile_id UUID;
+ALTER TABLE tier_vehicle_selections ADD COLUMN IF NOT EXISTS user_profile_id UUID;
+ALTER TABLE terms_agreements ADD COLUMN IF NOT EXISTS user_profile_id UUID;
+
+-- 1b. Special user-reference columns (submitted_by/reported_by store auth0_sub)
+ALTER TABLE community_stations ADD COLUMN IF NOT EXISTS submitted_by_uuid UUID;
+ALTER TABLE station_removal_reports ADD COLUMN IF NOT EXISTS reported_by_uuid UUID;
+
+-- 1c. Admin table: add id UUID and user_profile_id UUID
+ALTER TABLE admin_users ADD COLUMN IF NOT EXISTS id UUID;
+ALTER TABLE admin_users ADD COLUMN IF NOT EXISTS user_profile_id UUID;
+
+-- 1d. Admin-referencing columns: add UUID equivalents
+ALTER TABLE admin_audit_logs ADD COLUMN IF NOT EXISTS actor_admin_uuid UUID;
+ALTER TABLE admin_audit_logs ADD COLUMN IF NOT EXISTS target_admin_uuid UUID;
+ALTER TABLE admin_users ADD COLUMN IF NOT EXISTS created_by_uuid UUID;
+ALTER TABLE community_stations ADD COLUMN IF NOT EXISTS reviewed_by_uuid UUID;
+ALTER TABLE backup_history ADD COLUMN IF NOT EXISTS created_by_uuid UUID;
+ALTER TABLE platform_change_log ADD COLUMN IF NOT EXISTS changed_by_uuid UUID;
+ALTER TABLE user_profiles ADD COLUMN IF NOT EXISTS deactivated_by_uuid UUID;
+
+
+-- ============================================================================
+-- PHASE 2: Backfill UUID values from user_profiles join
+-- ============================================================================
+
+-- 2a. Feature tables: map user_id (auth0_sub) -> user_profiles.id (UUID)
+UPDATE vehicles SET user_profile_id = up.id
+  FROM user_profiles up WHERE vehicles.user_id = up.auth0_sub AND vehicles.user_profile_id IS NULL;
+
+UPDATE fuel_logs SET user_profile_id = up.id
+  FROM user_profiles up WHERE fuel_logs.user_id = up.auth0_sub AND fuel_logs.user_profile_id IS NULL;
+
+UPDATE maintenance_records SET user_profile_id = up.id
+  FROM user_profiles up WHERE maintenance_records.user_id = up.auth0_sub AND maintenance_records.user_profile_id IS NULL;
+
+UPDATE maintenance_schedules SET user_profile_id = up.id
+  FROM user_profiles up WHERE maintenance_schedules.user_id = up.auth0_sub AND maintenance_schedules.user_profile_id IS NULL;
+
+UPDATE documents SET user_profile_id = up.id
+  FROM user_profiles up WHERE documents.user_id = up.auth0_sub AND documents.user_profile_id IS NULL;
+
+UPDATE notification_logs SET user_profile_id = up.id
+  FROM user_profiles up WHERE notification_logs.user_id = up.auth0_sub AND notification_logs.user_profile_id IS NULL;
+
+UPDATE user_notifications SET user_profile_id = up.id
+  FROM user_profiles up WHERE user_notifications.user_id = up.auth0_sub AND user_notifications.user_profile_id IS NULL;
+
+UPDATE user_preferences SET user_profile_id = up.id
+  FROM user_profiles up WHERE user_preferences.user_id = up.auth0_sub AND user_preferences.user_profile_id IS NULL;
+
+UPDATE saved_stations SET user_profile_id = up.id
+  FROM user_profiles up WHERE saved_stations.user_id = up.auth0_sub AND saved_stations.user_profile_id IS NULL;
+
+UPDATE audit_logs SET user_profile_id = up.id
+  FROM user_profiles up WHERE audit_logs.user_id = up.auth0_sub AND audit_logs.user_profile_id IS NULL;
+
+UPDATE ownership_costs SET user_profile_id = up.id
+  FROM user_profiles up WHERE ownership_costs.user_id = up.auth0_sub AND ownership_costs.user_profile_id IS NULL;
+
+UPDATE email_ingestion_queue SET user_profile_id = up.id
+  FROM user_profiles up WHERE email_ingestion_queue.user_id = up.auth0_sub AND email_ingestion_queue.user_profile_id IS NULL;
+
+UPDATE pending_vehicle_associations SET user_profile_id = up.id
+  FROM user_profiles up WHERE pending_vehicle_associations.user_id = up.auth0_sub AND pending_vehicle_associations.user_profile_id IS NULL;
+
+UPDATE subscriptions SET user_profile_id = up.id
+  FROM user_profiles up WHERE subscriptions.user_id = up.auth0_sub AND subscriptions.user_profile_id IS NULL;
+
+UPDATE donations SET user_profile_id = up.id
+  FROM user_profiles up WHERE donations.user_id = up.auth0_sub AND donations.user_profile_id IS NULL;
+
+UPDATE tier_vehicle_selections SET user_profile_id = up.id
+  FROM user_profiles up WHERE tier_vehicle_selections.user_id = up.auth0_sub AND tier_vehicle_selections.user_profile_id IS NULL;
+
+UPDATE terms_agreements SET user_profile_id = up.id
+  FROM user_profiles up WHERE terms_agreements.user_id = up.auth0_sub AND terms_agreements.user_profile_id IS NULL;
+
+-- 2b. Special user columns
+UPDATE community_stations SET submitted_by_uuid = up.id
+  FROM user_profiles up WHERE community_stations.submitted_by = up.auth0_sub AND community_stations.submitted_by_uuid IS NULL;
+
+UPDATE station_removal_reports SET reported_by_uuid = up.id
+  FROM user_profiles up WHERE station_removal_reports.reported_by = up.auth0_sub AND station_removal_reports.reported_by_uuid IS NULL;
+
+
+-- ============================================================================
+-- PHASE 3: Admin-specific transformations
+-- ============================================================================
+
+-- 3a. Create user_profiles entries for any admin_users that lack one
+INSERT INTO user_profiles (auth0_sub, email)
+SELECT au.auth0_sub, au.email
+FROM admin_users au
+WHERE NOT EXISTS (
+  SELECT 1 FROM user_profiles up WHERE up.auth0_sub = au.auth0_sub
+)
+ON CONFLICT (auth0_sub) DO NOTHING;
+
+-- 3b. Populate admin_users.id (DEFAULT doesn't auto-fill on ALTER ADD COLUMN for existing rows)
+UPDATE admin_users SET id = uuid_generate_v4() WHERE id IS NULL;
+
+-- 3c. Backfill admin_users.user_profile_id from user_profiles join
+UPDATE admin_users SET user_profile_id = up.id
+  FROM user_profiles up WHERE admin_users.auth0_sub = up.auth0_sub AND admin_users.user_profile_id IS NULL;
+
+-- 3d. Backfill admin-referencing columns: map auth0_sub -> admin_users.id UUID
+UPDATE admin_audit_logs SET actor_admin_uuid = au.id
+  FROM admin_users au WHERE admin_audit_logs.actor_admin_id = au.auth0_sub AND admin_audit_logs.actor_admin_uuid IS NULL;
+
+UPDATE admin_audit_logs SET target_admin_uuid = au.id
+  FROM admin_users au WHERE admin_audit_logs.target_admin_id = au.auth0_sub AND admin_audit_logs.target_admin_uuid IS NULL;
+
+UPDATE admin_users au SET created_by_uuid = creator.id
+  FROM admin_users creator WHERE au.created_by = creator.auth0_sub AND au.created_by_uuid IS NULL;
+
+UPDATE community_stations SET reviewed_by_uuid = au.id
+  FROM admin_users au WHERE community_stations.reviewed_by = au.auth0_sub AND community_stations.reviewed_by_uuid IS NULL;
+
+UPDATE backup_history SET created_by_uuid = au.id
+  FROM admin_users au WHERE backup_history.created_by = au.auth0_sub AND backup_history.created_by_uuid IS NULL;
+
+UPDATE platform_change_log SET changed_by_uuid = au.id
+  FROM admin_users au WHERE platform_change_log.changed_by = au.auth0_sub AND platform_change_log.changed_by_uuid IS NULL;
+
+UPDATE user_profiles SET deactivated_by_uuid = au.id
+  FROM admin_users au WHERE user_profiles.deactivated_by = au.auth0_sub AND user_profiles.deactivated_by_uuid IS NULL;
+
+
+-- ============================================================================
+-- PHASE 4: Add constraints
+-- ============================================================================
+
+-- 4a. Set NOT NULL on feature table UUID columns (audit_logs stays nullable)
+ALTER TABLE vehicles ALTER COLUMN user_profile_id SET NOT NULL;
+ALTER TABLE fuel_logs ALTER COLUMN user_profile_id SET NOT NULL;
+ALTER TABLE maintenance_records ALTER COLUMN user_profile_id SET NOT NULL;
+ALTER TABLE maintenance_schedules ALTER COLUMN user_profile_id SET NOT NULL;
+ALTER TABLE documents ALTER COLUMN user_profile_id SET NOT NULL;
+ALTER TABLE notification_logs ALTER COLUMN user_profile_id SET NOT NULL;
+ALTER TABLE user_notifications ALTER COLUMN user_profile_id SET NOT NULL;
+ALTER TABLE user_preferences ALTER COLUMN user_profile_id SET NOT NULL;
+ALTER TABLE saved_stations ALTER COLUMN user_profile_id SET NOT NULL;
+-- audit_logs.user_profile_id stays NULLABLE (system actions have no user)
+ALTER TABLE ownership_costs ALTER COLUMN user_profile_id SET NOT NULL;
+ALTER TABLE email_ingestion_queue ALTER COLUMN user_profile_id SET NOT NULL;
+ALTER TABLE pending_vehicle_associations ALTER COLUMN user_profile_id SET NOT NULL;
+ALTER TABLE subscriptions ALTER COLUMN user_profile_id SET NOT NULL;
+ALTER TABLE donations ALTER COLUMN user_profile_id SET NOT NULL;
+ALTER TABLE tier_vehicle_selections ALTER COLUMN user_profile_id SET NOT NULL;
+ALTER TABLE terms_agreements ALTER COLUMN user_profile_id SET NOT NULL;
+ALTER TABLE community_stations ALTER COLUMN submitted_by_uuid SET NOT NULL;
+ALTER TABLE station_removal_reports ALTER COLUMN reported_by_uuid SET NOT NULL;
+
+-- 4b. Admin table NOT NULL constraints
+ALTER TABLE admin_users ALTER COLUMN id SET NOT NULL;
+ALTER TABLE admin_users ALTER COLUMN user_profile_id SET NOT NULL;
+ALTER TABLE admin_audit_logs ALTER COLUMN actor_admin_uuid SET NOT NULL;
+-- target_admin_uuid stays nullable (some actions have no target)
+-- created_by_uuid stays nullable (bootstrap admin may not have a creator)
+ALTER TABLE platform_change_log ALTER COLUMN changed_by_uuid SET NOT NULL;
+
+-- 4c. Admin table PK transformation
+ALTER TABLE admin_users DROP CONSTRAINT admin_users_pkey;
+ALTER TABLE admin_users ADD PRIMARY KEY (id);
+
+-- 4d. Add FK constraints to user_profiles(id) with ON DELETE CASCADE
+ALTER TABLE vehicles ADD CONSTRAINT fk_vehicles_user_profile_id
+  FOREIGN KEY (user_profile_id) REFERENCES user_profiles(id) ON DELETE CASCADE;
+ALTER TABLE fuel_logs ADD CONSTRAINT fk_fuel_logs_user_profile_id
+  FOREIGN KEY (user_profile_id) REFERENCES user_profiles(id) ON DELETE CASCADE;
+ALTER TABLE maintenance_records ADD CONSTRAINT fk_maintenance_records_user_profile_id
+  FOREIGN KEY (user_profile_id) REFERENCES user_profiles(id) ON DELETE CASCADE;
+ALTER TABLE maintenance_schedules ADD CONSTRAINT fk_maintenance_schedules_user_profile_id
+  FOREIGN KEY (user_profile_id) REFERENCES user_profiles(id) ON DELETE CASCADE;
+ALTER TABLE documents ADD CONSTRAINT fk_documents_user_profile_id
+  FOREIGN KEY (user_profile_id) REFERENCES user_profiles(id) ON DELETE CASCADE;
+ALTER TABLE notification_logs ADD CONSTRAINT fk_notification_logs_user_profile_id
+  FOREIGN KEY (user_profile_id) REFERENCES user_profiles(id) ON DELETE CASCADE;
+ALTER TABLE user_notifications ADD CONSTRAINT fk_user_notifications_user_profile_id
+  FOREIGN KEY (user_profile_id) REFERENCES user_profiles(id) ON DELETE CASCADE;
+ALTER TABLE user_preferences ADD CONSTRAINT fk_user_preferences_user_profile_id
+  FOREIGN KEY (user_profile_id) REFERENCES user_profiles(id) ON DELETE CASCADE;
+ALTER TABLE saved_stations ADD CONSTRAINT fk_saved_stations_user_profile_id
+  FOREIGN KEY (user_profile_id) REFERENCES user_profiles(id) ON DELETE CASCADE;
+ALTER TABLE audit_logs ADD CONSTRAINT fk_audit_logs_user_profile_id
+  FOREIGN KEY (user_profile_id) REFERENCES user_profiles(id) ON DELETE CASCADE;
+ALTER TABLE ownership_costs ADD CONSTRAINT fk_ownership_costs_user_profile_id
+  FOREIGN KEY (user_profile_id) REFERENCES user_profiles(id) ON DELETE CASCADE;
+ALTER TABLE email_ingestion_queue ADD CONSTRAINT fk_email_ingestion_queue_user_profile_id
+  FOREIGN KEY (user_profile_id) REFERENCES user_profiles(id) ON DELETE CASCADE;
+ALTER TABLE pending_vehicle_associations ADD CONSTRAINT fk_pending_vehicle_assoc_user_profile_id
+  FOREIGN KEY (user_profile_id) REFERENCES user_profiles(id) ON DELETE CASCADE;
+ALTER TABLE subscriptions ADD CONSTRAINT fk_subscriptions_user_profile_id
+  FOREIGN KEY (user_profile_id) REFERENCES user_profiles(id) ON DELETE CASCADE;
+ALTER TABLE donations ADD CONSTRAINT fk_donations_user_profile_id
+  FOREIGN KEY (user_profile_id) REFERENCES user_profiles(id) ON DELETE CASCADE;
+ALTER TABLE tier_vehicle_selections ADD CONSTRAINT fk_tier_vehicle_selections_user_profile_id
+  FOREIGN KEY (user_profile_id) REFERENCES user_profiles(id) ON DELETE CASCADE;
+ALTER TABLE terms_agreements ADD CONSTRAINT fk_terms_agreements_user_profile_id
+  FOREIGN KEY (user_profile_id) REFERENCES user_profiles(id) ON DELETE CASCADE;
+ALTER TABLE community_stations ADD CONSTRAINT fk_community_stations_submitted_by
+  FOREIGN KEY (submitted_by_uuid) REFERENCES user_profiles(id) ON DELETE CASCADE;
+ALTER TABLE station_removal_reports ADD CONSTRAINT fk_station_removal_reports_reported_by
+  FOREIGN KEY (reported_by_uuid) REFERENCES user_profiles(id) ON DELETE CASCADE;
+
+-- 4e. Admin FK constraints
+ALTER TABLE admin_users ADD CONSTRAINT fk_admin_users_user_profile_id
+  FOREIGN KEY (user_profile_id) REFERENCES user_profiles(id);
+ALTER TABLE admin_users ADD CONSTRAINT uq_admin_users_user_profile_id
+  UNIQUE (user_profile_id);
+
+
+-- ============================================================================
+-- PHASE 5: Drop old columns, rename new ones, recreate indexes
+-- ============================================================================
+
+-- 5a. Drop old FK constraints on VARCHAR user_id columns
+ALTER TABLE subscriptions DROP CONSTRAINT IF EXISTS fk_subscriptions_user_id;
+ALTER TABLE donations DROP CONSTRAINT IF EXISTS fk_donations_user_id;
+ALTER TABLE tier_vehicle_selections DROP CONSTRAINT IF EXISTS fk_tier_vehicle_selections_user_id;
+
+-- 5b. Drop old UNIQUE constraints involving VARCHAR columns
+ALTER TABLE vehicles DROP CONSTRAINT IF EXISTS unique_user_vin;
+ALTER TABLE saved_stations DROP CONSTRAINT IF EXISTS unique_user_station;
+ALTER TABLE user_preferences DROP CONSTRAINT IF EXISTS user_preferences_user_id_key;
+ALTER TABLE station_removal_reports DROP CONSTRAINT IF EXISTS unique_user_station_report;
+
+-- 5c. Drop old indexes on VARCHAR columns
+DROP INDEX IF EXISTS idx_vehicles_user_id;
+DROP INDEX IF EXISTS idx_fuel_logs_user_id;
+DROP INDEX IF EXISTS idx_maintenance_records_user_id;
+DROP INDEX IF EXISTS idx_maintenance_schedules_user_id;
+DROP INDEX IF EXISTS idx_documents_user_id;
+DROP INDEX IF EXISTS idx_documents_user_vehicle;
+DROP INDEX IF EXISTS idx_notification_logs_user_id;
+DROP INDEX IF EXISTS idx_user_notifications_user_id;
+DROP INDEX IF EXISTS idx_user_notifications_unread;
+DROP INDEX IF EXISTS idx_user_preferences_user_id;
+DROP INDEX IF EXISTS idx_saved_stations_user_id;
+DROP INDEX IF EXISTS idx_audit_logs_user_created;
+DROP INDEX IF EXISTS idx_ownership_costs_user_id;
+DROP INDEX IF EXISTS idx_email_ingestion_queue_user_id;
+DROP INDEX IF EXISTS idx_pending_vehicle_assoc_user_id;
+DROP INDEX IF EXISTS idx_subscriptions_user_id;
+DROP INDEX IF EXISTS idx_donations_user_id;
+DROP INDEX IF EXISTS idx_tier_vehicle_selections_user_id;
+DROP INDEX IF EXISTS idx_terms_agreements_user_id;
+DROP INDEX IF EXISTS idx_community_stations_submitted_by;
+DROP INDEX IF EXISTS idx_removal_reports_reported_by;
+DROP INDEX IF EXISTS idx_admin_audit_logs_actor_id;
+DROP INDEX IF EXISTS idx_admin_audit_logs_target_id;
+DROP INDEX IF EXISTS idx_platform_change_log_changed_by;
+
+-- 5d. Drop old VARCHAR user_id columns from feature tables
+ALTER TABLE vehicles DROP COLUMN user_id;
+ALTER TABLE fuel_logs DROP COLUMN user_id;
+ALTER TABLE maintenance_records DROP COLUMN user_id;
+ALTER TABLE maintenance_schedules DROP COLUMN user_id;
+ALTER TABLE documents DROP COLUMN user_id;
+ALTER TABLE notification_logs DROP COLUMN user_id;
+ALTER TABLE user_notifications DROP COLUMN user_id;
+ALTER TABLE user_preferences DROP COLUMN user_id;
+ALTER TABLE saved_stations DROP COLUMN user_id;
+ALTER TABLE audit_logs DROP COLUMN user_id;
+ALTER TABLE ownership_costs DROP COLUMN user_id;
+ALTER TABLE email_ingestion_queue DROP COLUMN user_id;
+ALTER TABLE pending_vehicle_associations DROP COLUMN user_id;
+ALTER TABLE subscriptions DROP COLUMN user_id;
+ALTER TABLE donations DROP COLUMN user_id;
+ALTER TABLE tier_vehicle_selections DROP COLUMN user_id;
+ALTER TABLE terms_agreements DROP COLUMN user_id;
+
+-- 5e. Rename user_profile_id -> user_id in feature tables
+ALTER TABLE vehicles RENAME COLUMN user_profile_id TO user_id;
+ALTER TABLE fuel_logs RENAME COLUMN user_profile_id TO user_id;
+ALTER TABLE maintenance_records RENAME COLUMN user_profile_id TO user_id;
+ALTER TABLE maintenance_schedules RENAME COLUMN user_profile_id TO user_id;
+ALTER TABLE documents RENAME COLUMN user_profile_id TO user_id;
+ALTER TABLE notification_logs RENAME COLUMN user_profile_id TO user_id;
+ALTER TABLE user_notifications RENAME COLUMN user_profile_id TO user_id;
+ALTER TABLE user_preferences RENAME COLUMN user_profile_id TO user_id;
+ALTER TABLE saved_stations RENAME COLUMN user_profile_id TO user_id;
+ALTER TABLE audit_logs RENAME COLUMN user_profile_id TO user_id;
+ALTER TABLE ownership_costs RENAME COLUMN user_profile_id TO user_id;
+ALTER TABLE email_ingestion_queue RENAME COLUMN user_profile_id TO user_id;
+ALTER TABLE pending_vehicle_associations RENAME COLUMN user_profile_id TO user_id;
+ALTER TABLE subscriptions RENAME COLUMN user_profile_id TO user_id;
+ALTER TABLE donations RENAME COLUMN user_profile_id TO user_id;
+ALTER TABLE tier_vehicle_selections RENAME COLUMN user_profile_id TO user_id;
+ALTER TABLE terms_agreements RENAME COLUMN user_profile_id TO user_id;
+
+-- 5f. Drop and rename special user columns
+ALTER TABLE community_stations DROP COLUMN submitted_by;
+ALTER TABLE community_stations RENAME COLUMN submitted_by_uuid TO submitted_by;
+ALTER TABLE station_removal_reports DROP COLUMN reported_by;
+ALTER TABLE station_removal_reports RENAME COLUMN reported_by_uuid TO reported_by;
+
+-- 5g. Drop and rename admin-referencing columns
+ALTER TABLE admin_users DROP COLUMN auth0_sub;
+ALTER TABLE admin_users DROP COLUMN created_by;
+ALTER TABLE admin_users RENAME COLUMN created_by_uuid TO created_by;
+
+ALTER TABLE admin_audit_logs DROP COLUMN actor_admin_id;
+ALTER TABLE admin_audit_logs DROP COLUMN target_admin_id;
+ALTER TABLE admin_audit_logs RENAME COLUMN actor_admin_uuid TO actor_admin_id;
+ALTER TABLE admin_audit_logs RENAME COLUMN target_admin_uuid TO target_admin_id;
+
+ALTER TABLE community_stations DROP COLUMN reviewed_by;
+ALTER TABLE community_stations RENAME COLUMN reviewed_by_uuid TO reviewed_by;
+
+ALTER TABLE backup_history DROP COLUMN created_by;
+ALTER TABLE backup_history RENAME COLUMN created_by_uuid TO created_by;
+
+ALTER TABLE platform_change_log DROP COLUMN changed_by;
+ALTER TABLE platform_change_log RENAME COLUMN changed_by_uuid TO changed_by;
+
+ALTER TABLE user_profiles DROP COLUMN deactivated_by;
+ALTER TABLE user_profiles RENAME COLUMN deactivated_by_uuid TO deactivated_by;
+
+-- 5h. Recreate indexes on new UUID columns (feature tables)
+CREATE INDEX idx_vehicles_user_id ON vehicles(user_id);
+CREATE INDEX idx_fuel_logs_user_id ON fuel_logs(user_id);
+CREATE INDEX idx_maintenance_records_user_id ON maintenance_records(user_id);
+CREATE INDEX idx_maintenance_schedules_user_id ON maintenance_schedules(user_id);
+CREATE INDEX idx_documents_user_id ON documents(user_id);
+CREATE INDEX idx_documents_user_vehicle ON documents(user_id, vehicle_id);
+CREATE INDEX idx_notification_logs_user_id ON notification_logs(user_id);
+CREATE INDEX idx_user_notifications_user_id ON user_notifications(user_id);
+CREATE INDEX idx_user_notifications_unread ON user_notifications(user_id, created_at DESC) WHERE is_read = false;
+CREATE INDEX idx_user_preferences_user_id ON user_preferences(user_id);
+CREATE INDEX idx_saved_stations_user_id ON saved_stations(user_id);
+CREATE INDEX idx_audit_logs_user_created ON audit_logs(user_id, created_at DESC);
+CREATE INDEX idx_ownership_costs_user_id ON ownership_costs(user_id);
+CREATE INDEX idx_email_ingestion_queue_user_id ON email_ingestion_queue(user_id);
+CREATE INDEX idx_pending_vehicle_assoc_user_id ON pending_vehicle_associations(user_id);
+CREATE INDEX idx_subscriptions_user_id ON subscriptions(user_id);
+CREATE INDEX idx_donations_user_id ON donations(user_id);
+CREATE INDEX idx_tier_vehicle_selections_user_id ON tier_vehicle_selections(user_id);
+CREATE INDEX idx_terms_agreements_user_id ON terms_agreements(user_id);
+
+-- 5i. Recreate indexes on special columns
+CREATE INDEX idx_community_stations_submitted_by ON community_stations(submitted_by);
+CREATE INDEX idx_removal_reports_reported_by ON station_removal_reports(reported_by);
+CREATE INDEX idx_admin_audit_logs_actor_id ON admin_audit_logs(actor_admin_id);
+CREATE INDEX idx_admin_audit_logs_target_id ON admin_audit_logs(target_admin_id);
+CREATE INDEX idx_platform_change_log_changed_by ON platform_change_log(changed_by);
+
+-- 5j. Recreate UNIQUE constraints on new UUID columns
+ALTER TABLE vehicles ADD CONSTRAINT unique_user_vin UNIQUE(user_id, vin);
+ALTER TABLE saved_stations ADD CONSTRAINT unique_user_station UNIQUE(user_id, place_id);
+ALTER TABLE user_preferences ADD CONSTRAINT user_preferences_user_id_key UNIQUE(user_id);
+ALTER TABLE station_removal_reports ADD CONSTRAINT unique_user_station_report UNIQUE(station_id, reported_by);
+
+COMMIT;

backend/src/core/middleware/require-tier.test.ts

@@ -17,7 +17,7 @@ const createRequest = (subscriptionTier?: string): Partial<FastifyRequest> => {
   }
   return {
     userContext: {
-      userId: 'auth0|user123456789',
+      userId: '550e8400-e29b-41d4-a716-446655440000',
       email: 'user@example.com',
       emailVerified: true,
       onboardingCompleted: true,

backend/src/core/plugins/admin-guard.plugin.ts

@@ -58,9 +58,9 @@ const adminGuardPlugin: FastifyPluginAsync = async (fastify) => {
 
       // Check if user is in admin_users table and not revoked
       const query = `
-        SELECT auth0_sub, email, role, revoked_at
+        SELECT id, user_profile_id, email, role, revoked_at
         FROM admin_users
-        WHERE auth0_sub = $1 AND revoked_at IS NULL
+        WHERE user_profile_id = $1 AND revoked_at IS NULL
         LIMIT 1
       `;
 

backend/src/core/plugins/auth.plugin.ts

@@ -121,11 +121,14 @@ const authPlugin: FastifyPluginAsync = async (fastify) => {
     try {
       await request.jwtVerify();
 
-      const userId = request.user?.sub;
-      if (!userId) {
+      // Two identifiers: auth0Sub (external, for Auth0 API) and userId (internal UUID, for all DB operations)
+      const auth0Sub = request.user?.sub;
+      if (!auth0Sub) {
         throw new Error('Missing user ID in JWT');
       }
 
+      let userId: string = auth0Sub; // Default to auth0Sub; overwritten with UUID after profile load
+
       // Get or create user profile from database
       let email = request.user?.email;
       let displayName: string | undefined;
@@ -137,28 +140,29 @@ const authPlugin: FastifyPluginAsync = async (fastify) => {
         // If JWT doesn't have email, fetch from Auth0 Management API
         if (!email || email.includes('@unknown.local')) {
           try {
-            const auth0User = await auth0ManagementClient.getUser(userId);
+            const auth0User = await auth0ManagementClient.getUser(auth0Sub);
             if (auth0User.email) {
               email = auth0User.email;
               emailVerified = auth0User.emailVerified;
               logger.info('Fetched email from Auth0 Management API', {
-                userId: userId.substring(0, 8) + '...',
+                userId: auth0Sub.substring(0, 8) + '...',
                 hasEmail: true,
               });
             }
           } catch (auth0Error) {
             logger.warn('Failed to fetch user from Auth0 Management API', {
-              userId: userId.substring(0, 8) + '...',
+              userId: auth0Sub.substring(0, 8) + '...',
               error: auth0Error instanceof Error ? auth0Error.message : 'Unknown error',
             });
           }
         }
 
         // Get or create profile with correct email
-        const profile = await profileRepo.getOrCreate(userId, {
-          email: email || `${userId}@unknown.local`,
+        const profile = await profileRepo.getOrCreate(auth0Sub, {
+          email: email || `${auth0Sub}@unknown.local`,
           displayName: request.user?.name || request.user?.nickname,
         });
+        userId = profile.id;
 
         // If profile has placeholder email but we now have real email, update it
         if (profile.email.includes('@unknown.local') && email && !email.includes('@unknown.local')) {
@@ -178,7 +182,7 @@ const authPlugin: FastifyPluginAsync = async (fastify) => {
         // Sync email verification status from Auth0 if needed
         if (!emailVerified) {
           try {
-            const isVerifiedInAuth0 = await auth0ManagementClient.checkEmailVerified(userId);
+            const isVerifiedInAuth0 = await auth0ManagementClient.checkEmailVerified(auth0Sub);
             if (isVerifiedInAuth0 && !profile.emailVerified) {
               await profileRepo.updateEmailVerified(userId, true);
               emailVerified = true;
@@ -197,7 +201,7 @@ const authPlugin: FastifyPluginAsync = async (fastify) => {
       } catch (profileError) {
         // Log but don't fail auth if profile fetch fails
         logger.warn('Failed to fetch user profile', {
-          userId: userId.substring(0, 8) + '...',
+          userId: auth0Sub.substring(0, 8) + '...',
           error: profileError instanceof Error ? profileError.message : 'Unknown error',
         });
         // Fall back to JWT email if available

backend/src/core/plugins/tests/tier-guard.plugin.test.ts

@@ -26,7 +26,7 @@ describe('tier guard plugin', () => {
     // Mock authenticate to set userContext
     authenticateMock = jest.fn(async (request: FastifyRequest) => {
       request.userContext = {
-        userId: 'auth0|user123',
+        userId: '550e8400-e29b-41d4-a716-446655440000',
         email: 'user@example.com',
         emailVerified: true,
         onboardingCompleted: true,
@@ -48,7 +48,7 @@ describe('tier guard plugin', () => {
     it('allows access when user tier meets minimum', async () => {
       authenticateMock.mockImplementation(async (request: FastifyRequest) => {
         request.userContext = {
-          userId: 'auth0|user123',
+          userId: '550e8400-e29b-41d4-a716-446655440000',
           email: 'user@example.com',
           emailVerified: true,
           onboardingCompleted: true,
@@ -71,7 +71,7 @@ describe('tier guard plugin', () => {
     it('allows access when user tier exceeds minimum', async () => {
       authenticateMock.mockImplementation(async (request: FastifyRequest) => {
         request.userContext = {
-          userId: 'auth0|user123',
+          userId: '550e8400-e29b-41d4-a716-446655440000',
           email: 'user@example.com',
           emailVerified: true,
           onboardingCompleted: true,
@@ -130,7 +130,7 @@ describe('tier guard plugin', () => {
     it('allows pro tier access to pro feature', async () => {
       authenticateMock.mockImplementation(async (request: FastifyRequest) => {
         request.userContext = {
-          userId: 'auth0|user123',
+          userId: '550e8400-e29b-41d4-a716-446655440000',
           email: 'user@example.com',
           emailVerified: true,
           onboardingCompleted: true,

backend/src/features/admin/api/admin.controller.ts

@@ -6,11 +6,12 @@
 import { FastifyRequest, FastifyReply } from 'fastify';
 import { AdminService } from '../domain/admin.service';
 import { AdminRepository } from '../data/admin.repository';
+import { UserProfileRepository } from '../../user-profile/data/user-profile.repository';
 import { pool } from '../../../core/config/database';
 import { logger } from '../../../core/logging/logger';
 import {
   CreateAdminInput,
-  AdminAuth0SubInput,
+  AdminIdInput,
   AuditLogsQueryInput,
   BulkCreateAdminInput,
   BulkRevokeAdminInput,
@@ -18,7 +19,7 @@ import {
 } from './admin.validation';
 import {
   createAdminSchema,
-  adminAuth0SubSchema,
+  adminIdSchema,
   auditLogsQuerySchema,
   bulkCreateAdminSchema,
   bulkRevokeAdminSchema,
@@ -33,10 +34,12 @@ import {
 
 export class AdminController {
   private adminService: AdminService;
+  private userProfileRepository: UserProfileRepository;
 
   constructor() {
     const repository = new AdminRepository(pool);
     this.adminService = new AdminService(repository);
+    this.userProfileRepository = new UserProfileRepository(pool);
   }
 
   /**
@@ -47,49 +50,18 @@ export class AdminController {
       const userId = request.userContext?.userId;
       const userEmail = this.resolveUserEmail(request);
 
-      console.log('[DEBUG] Admin verify - userId:', userId);
-      console.log('[DEBUG] Admin verify - userEmail:', userEmail);
-
       if (userEmail && request.userContext) {
         request.userContext.email = userEmail.toLowerCase();
       }
 
-      if (!userId && !userEmail) {
-        console.log('[DEBUG] Admin verify - No userId or userEmail, returning 401');
+      if (!userId) {
         return reply.code(401).send({
           error: 'Unauthorized',
           message: 'User context missing'
         });
       }
 
-      let adminRecord = userId
-        ? await this.adminService.getAdminByAuth0Sub(userId)
-        : null;
-
-      console.log('[DEBUG] Admin verify - adminRecord by auth0Sub:', adminRecord ? 'FOUND' : 'NOT FOUND');
-
-      // Fallback: attempt to resolve admin by email for legacy records
-      if (!adminRecord && userEmail) {
-        const emailMatch = await this.adminService.getAdminByEmail(userEmail.toLowerCase());
-
-        console.log('[DEBUG] Admin verify - emailMatch:', emailMatch ? 'FOUND' : 'NOT FOUND');
-        if (emailMatch) {
-          console.log('[DEBUG] Admin verify - emailMatch.auth0Sub:', emailMatch.auth0Sub);
-          console.log('[DEBUG] Admin verify - emailMatch.revokedAt:', emailMatch.revokedAt);
-        }
-
-        if (emailMatch && !emailMatch.revokedAt) {
-          // If the stored auth0Sub differs, link it to the authenticated user
-          if (userId && emailMatch.auth0Sub !== userId) {
-            console.log('[DEBUG] Admin verify - Calling linkAdminAuth0Sub to update auth0Sub');
-            adminRecord = await this.adminService.linkAdminAuth0Sub(userEmail, userId);
-            console.log('[DEBUG] Admin verify - adminRecord after link:', adminRecord ? 'SUCCESS' : 'FAILED');
-          } else {
-            console.log('[DEBUG] Admin verify - Using emailMatch as adminRecord');
-            adminRecord = emailMatch;
-          }
-        }
-      }
+      const adminRecord = await this.adminService.getAdminByUserProfileId(userId);
 
       if (adminRecord && !adminRecord.revokedAt) {
         if (request.userContext) {
@@ -97,12 +69,11 @@ export class AdminController {
           request.userContext.adminRecord = adminRecord;
         }
 
-        console.log('[DEBUG] Admin verify - Returning isAdmin: true');
-        // User is an active admin
         return reply.code(200).send({
           isAdmin: true,
           adminRecord: {
-            auth0Sub: adminRecord.auth0Sub,
+            id: adminRecord.id,
+            userProfileId: adminRecord.userProfileId,
             email: adminRecord.email,
             role: adminRecord.role
           }
@@ -114,14 +85,11 @@ export class AdminController {
         request.userContext.adminRecord = undefined;
       }
 
-      console.log('[DEBUG] Admin verify - Returning isAdmin: false');
-      // User is not an admin
       return reply.code(200).send({
         isAdmin: false,
         adminRecord: null
       });
     } catch (error) {
-      console.log('[DEBUG] Admin verify - Error caught:', error instanceof Error ? error.message : 'Unknown error');
       logger.error('Error verifying admin access', {
         error: error instanceof Error ? error.message : 'Unknown error',
         userId: request.userContext?.userId?.substring(0, 8) + '...'
@@ -139,9 +107,9 @@ export class AdminController {
    */
   async listAdmins(request: FastifyRequest, reply: FastifyReply) {
     try {
-      const actorId = request.userContext?.userId;
+      const actorUserProfileId = request.userContext?.userId;
 
-      if (!actorId) {
+      if (!actorUserProfileId) {
         return reply.code(401).send({
           error: 'Unauthorized',
           message: 'User context missing'
@@ -150,11 +118,6 @@ export class AdminController {
 
       const admins = await this.adminService.getAllAdmins();
 
-      // Log VIEW action
-      await this.adminService.getAdminByAuth0Sub(actorId);
-      // Note: Not logging VIEW as it would create excessive audit entries
-      // VIEW logging can be enabled if needed for compliance
-
       return reply.code(200).send({
         total: admins.length,
         admins
@@ -162,7 +125,7 @@ export class AdminController {
     } catch (error: any) {
       logger.error('Error listing admins', {
         error: error.message,
-        actorId: request.userContext?.userId
+        actorUserProfileId: request.userContext?.userId
       });
       return reply.code(500).send({
         error: 'Internal server error',
@@ -179,15 +142,24 @@ export class AdminController {
     reply: FastifyReply
   ) {
     try {
-      const actorId = request.userContext?.userId;
+      const actorUserProfileId = request.userContext?.userId;
 
-      if (!actorId) {
+      if (!actorUserProfileId) {
         return reply.code(401).send({
           error: 'Unauthorized',
           message: 'User context missing'
         });
       }
 
+      // Get actor's admin record to get admin ID
+      const actorAdmin = await this.adminService.getAdminByUserProfileId(actorUserProfileId);
+      if (!actorAdmin) {
+        return reply.code(403).send({
+          error: 'Forbidden',
+          message: 'Actor is not an admin'
+        });
+      }
+
       // Validate request body
       const validation = createAdminSchema.safeParse(request.body);
       if (!validation.success) {
@@ -200,23 +172,27 @@ export class AdminController {
 
       const { email, role } = validation.data;
 
-      // Generate auth0Sub for the new admin
-      // In production, this should be the actual Auth0 user ID
-      // For now, we'll use email-based identifier
-      const auth0Sub = `auth0|${email.replace('@', '_at_')}`;
+      // Look up user profile by email to get UUID
+      const userProfile = await this.userProfileRepository.getByEmail(email);
+      if (!userProfile) {
+        return reply.code(404).send({
+          error: 'Not Found',
+          message: `No user profile found with email ${email}. User must sign up first.`
+        });
+      }
 
       const admin = await this.adminService.createAdmin(
         email,
         role,
-        auth0Sub,
-        actorId
+        userProfile.id,
+        actorAdmin.id
       );
 
       return reply.code(201).send(admin);
     } catch (error: any) {
       logger.error('Error creating admin', {
         error: error.message,
-        actorId: request.userContext?.userId
+        actorUserProfileId: request.userContext?.userId
       });
 
       if (error.message.includes('already exists')) {
@@ -234,36 +210,45 @@ export class AdminController {
   }
 
   /**
-   * PATCH /api/admin/admins/:auth0Sub/revoke - Revoke admin access
+   * PATCH /api/admin/admins/:id/revoke - Revoke admin access
    */
   async revokeAdmin(
-    request: FastifyRequest<{ Params: AdminAuth0SubInput }>,
+    request: FastifyRequest<{ Params: AdminIdInput }>,
     reply: FastifyReply
   ) {
     try {
-      const actorId = request.userContext?.userId;
+      const actorUserProfileId = request.userContext?.userId;
 
-      if (!actorId) {
+      if (!actorUserProfileId) {
         return reply.code(401).send({
           error: 'Unauthorized',
           message: 'User context missing'
         });
       }
 
+      // Get actor's admin record
+      const actorAdmin = await this.adminService.getAdminByUserProfileId(actorUserProfileId);
+      if (!actorAdmin) {
+        return reply.code(403).send({
+          error: 'Forbidden',
+          message: 'Actor is not an admin'
+        });
+      }
+
       // Validate params
-      const validation = adminAuth0SubSchema.safeParse(request.params);
+      const validation = adminIdSchema.safeParse(request.params);
       if (!validation.success) {
         return reply.code(400).send({
           error: 'Bad Request',
-          message: 'Invalid auth0Sub parameter',
+          message: 'Invalid admin ID parameter',
           details: validation.error.errors
         });
       }
 
-      const { auth0Sub } = validation.data;
+      const { id } = validation.data;
 
       // Check if admin exists
-      const targetAdmin = await this.adminService.getAdminByAuth0Sub(auth0Sub);
+      const targetAdmin = await this.adminService.getAdminById(id);
       if (!targetAdmin) {
         return reply.code(404).send({
           error: 'Not Found',
@@ -272,14 +257,14 @@ export class AdminController {
       }
 
       // Revoke the admin (service handles last admin check)
-      const admin = await this.adminService.revokeAdmin(auth0Sub, actorId);
+      const admin = await this.adminService.revokeAdmin(id, actorAdmin.id);
 
       return reply.code(200).send(admin);
     } catch (error: any) {
       logger.error('Error revoking admin', {
         error: error.message,
-        actorId: request.userContext?.userId,
-        targetAuth0Sub: request.params.auth0Sub
+        actorUserProfileId: request.userContext?.userId,
+        targetAdminId: (request.params as any).id
       });
 
       if (error.message.includes('Cannot revoke the last active admin')) {
@@ -304,36 +289,45 @@ export class AdminController {
   }
 
   /**
-   * PATCH /api/admin/admins/:auth0Sub/reinstate - Restore revoked admin
+   * PATCH /api/admin/admins/:id/reinstate - Restore revoked admin
    */
   async reinstateAdmin(
-    request: FastifyRequest<{ Params: AdminAuth0SubInput }>,
+    request: FastifyRequest<{ Params: AdminIdInput }>,
     reply: FastifyReply
   ) {
     try {
-      const actorId = request.userContext?.userId;
+      const actorUserProfileId = request.userContext?.userId;
 
-      if (!actorId) {
+      if (!actorUserProfileId) {
         return reply.code(401).send({
           error: 'Unauthorized',
           message: 'User context missing'
         });
       }
 
+      // Get actor's admin record
+      const actorAdmin = await this.adminService.getAdminByUserProfileId(actorUserProfileId);
+      if (!actorAdmin) {
+        return reply.code(403).send({
+          error: 'Forbidden',
+          message: 'Actor is not an admin'
+        });
+      }
+
       // Validate params
-      const validation = adminAuth0SubSchema.safeParse(request.params);
+      const validation = adminIdSchema.safeParse(request.params);
       if (!validation.success) {
         return reply.code(400).send({
           error: 'Bad Request',
-          message: 'Invalid auth0Sub parameter',
+          message: 'Invalid admin ID parameter',
           details: validation.error.errors
         });
       }
 
-      const { auth0Sub } = validation.data;
+      const { id } = validation.data;
 
       // Check if admin exists
-      const targetAdmin = await this.adminService.getAdminByAuth0Sub(auth0Sub);
+      const targetAdmin = await this.adminService.getAdminById(id);
       if (!targetAdmin) {
         return reply.code(404).send({
           error: 'Not Found',
@@ -342,14 +336,14 @@ export class AdminController {
       }
 
       // Reinstate the admin
-      const admin = await this.adminService.reinstateAdmin(auth0Sub, actorId);
+      const admin = await this.adminService.reinstateAdmin(id, actorAdmin.id);
 
       return reply.code(200).send(admin);
     } catch (error: any) {
       logger.error('Error reinstating admin', {
         error: error.message,
-        actorId: request.userContext?.userId,
-        targetAuth0Sub: request.params.auth0Sub
+        actorUserProfileId: request.userContext?.userId,
+        targetAdminId: (request.params as any).id
       });
 
       if (error.message.includes('not found')) {
@@ -418,15 +412,24 @@ export class AdminController {
     reply: FastifyReply
   ) {
     try {
-      const actorId = request.userContext?.userId;
+      const actorUserProfileId = request.userContext?.userId;
 
-      if (!actorId) {
+      if (!actorUserProfileId) {
         return reply.code(401).send({
           error: 'Unauthorized',
           message: 'User context missing'
         });
       }
 
+      // Get actor's admin record
+      const actorAdmin = await this.adminService.getAdminByUserProfileId(actorUserProfileId);
+      if (!actorAdmin) {
+        return reply.code(403).send({
+          error: 'Forbidden',
+          message: 'Actor is not an admin'
+        });
+      }
+
       // Validate request body
       const validation = bulkCreateAdminSchema.safeParse(request.body);
       if (!validation.success) {
@@ -447,15 +450,21 @@ export class AdminController {
         try {
           const { email, role = 'admin' } = adminInput;
 
-          // Generate auth0Sub for the new admin
-          // In production, this should be the actual Auth0 user ID
-          const auth0Sub = `auth0|${email.replace('@', '_at_')}`;
+          // Look up user profile by email to get UUID
+          const userProfile = await this.userProfileRepository.getByEmail(email);
+          if (!userProfile) {
+            failed.push({
+              email,
+              error: `No user profile found with email ${email}. User must sign up first.`
+            });
+            continue;
+          }
 
           const admin = await this.adminService.createAdmin(
             email,
             role,
-            auth0Sub,
-            actorId
+            userProfile.id,
+            actorAdmin.id
           );
 
           created.push(admin);
@@ -463,7 +472,7 @@ export class AdminController {
           logger.error('Error creating admin in bulk operation', {
             error: error.message,
             email: adminInput.email,
-            actorId
+            actorAdminId: actorAdmin.id
           });
 
           failed.push({
@@ -485,7 +494,7 @@ export class AdminController {
     } catch (error: any) {
       logger.error('Error in bulk create admins', {
         error: error.message,
-        actorId: request.userContext?.userId
+        actorUserProfileId: request.userContext?.userId
       });
 
       return reply.code(500).send({
@@ -503,15 +512,24 @@ export class AdminController {
     reply: FastifyReply
   ) {
     try {
-      const actorId = request.userContext?.userId;
+      const actorUserProfileId = request.userContext?.userId;
 
-      if (!actorId) {
+      if (!actorUserProfileId) {
         return reply.code(401).send({
           error: 'Unauthorized',
           message: 'User context missing'
         });
       }
 
+      // Get actor's admin record
+      const actorAdmin = await this.adminService.getAdminByUserProfileId(actorUserProfileId);
+      if (!actorAdmin) {
+        return reply.code(403).send({
+          error: 'Forbidden',
+          message: 'Actor is not an admin'
+        });
+      }
+
       // Validate request body
       const validation = bulkRevokeAdminSchema.safeParse(request.body);
       if (!validation.success) {
@@ -522,37 +540,36 @@ export class AdminController {
         });
       }
 
-      const { auth0Subs } = validation.data;
+      const { ids } = validation.data;
 
       const revoked: AdminUser[] = [];
-      const failed: Array<{ auth0Sub: string; error: string }> = [];
+      const failed: Array<{ id: string; error: string }> = [];
 
       // Process each revocation sequentially to maintain data consistency
-      for (const auth0Sub of auth0Subs) {
+      for (const id of ids) {
         try {
           // Check if admin exists
-          const targetAdmin = await this.adminService.getAdminByAuth0Sub(auth0Sub);
+          const targetAdmin = await this.adminService.getAdminById(id);
           if (!targetAdmin) {
             failed.push({
-              auth0Sub,
+              id,
               error: 'Admin user not found'
             });
             continue;
           }
 
           // Attempt to revoke the admin
-          const admin = await this.adminService.revokeAdmin(auth0Sub, actorId);
+          const admin = await this.adminService.revokeAdmin(id, actorAdmin.id);
           revoked.push(admin);
         } catch (error: any) {
           logger.error('Error revoking admin in bulk operation', {
             error: error.message,
-            auth0Sub,
-            actorId
+            adminId: id,
+            actorAdminId: actorAdmin.id
           });
 
-          // Special handling for "last admin" constraint
           failed.push({
-            auth0Sub,
+            id,
             error: error.message || 'Failed to revoke admin'
           });
         }
@@ -570,7 +587,7 @@ export class AdminController {
     } catch (error: any) {
       logger.error('Error in bulk revoke admins', {
         error: error.message,
-        actorId: request.userContext?.userId
+        actorUserProfileId: request.userContext?.userId
       });
 
       return reply.code(500).send({
@@ -588,15 +605,24 @@ export class AdminController {
     reply: FastifyReply
   ) {
     try {
-      const actorId = request.userContext?.userId;
+      const actorUserProfileId = request.userContext?.userId;
 
-      if (!actorId) {
+      if (!actorUserProfileId) {
         return reply.code(401).send({
           error: 'Unauthorized',
           message: 'User context missing'
         });
       }
 
+      // Get actor's admin record
+      const actorAdmin = await this.adminService.getAdminByUserProfileId(actorUserProfileId);
+      if (!actorAdmin) {
+        return reply.code(403).send({
+          error: 'Forbidden',
+          message: 'Actor is not an admin'
+        });
+      }
+
       // Validate request body
       const validation = bulkReinstateAdminSchema.safeParse(request.body);
       if (!validation.success) {
@@ -607,36 +633,36 @@ export class AdminController {
         });
       }
 
-      const { auth0Subs } = validation.data;
+      const { ids } = validation.data;
 
       const reinstated: AdminUser[] = [];
-      const failed: Array<{ auth0Sub: string; error: string }> = [];
+      const failed: Array<{ id: string; error: string }> = [];
 
       // Process each reinstatement sequentially to maintain data consistency
-      for (const auth0Sub of auth0Subs) {
+      for (const id of ids) {
         try {
           // Check if admin exists
-          const targetAdmin = await this.adminService.getAdminByAuth0Sub(auth0Sub);
+          const targetAdmin = await this.adminService.getAdminById(id);
           if (!targetAdmin) {
             failed.push({
-              auth0Sub,
+              id,
               error: 'Admin user not found'
             });
             continue;
           }
 
           // Attempt to reinstate the admin
-          const admin = await this.adminService.reinstateAdmin(auth0Sub, actorId);
+          const admin = await this.adminService.reinstateAdmin(id, actorAdmin.id);
           reinstated.push(admin);
         } catch (error: any) {
           logger.error('Error reinstating admin in bulk operation', {
             error: error.message,
-            auth0Sub,
-            actorId
+            adminId: id,
+            actorAdminId: actorAdmin.id
           });
 
           failed.push({
-            auth0Sub,
+            id,
             error: error.message || 'Failed to reinstate admin'
           });
         }
@@ -654,7 +680,7 @@ export class AdminController {
     } catch (error: any) {
       logger.error('Error in bulk reinstate admins', {
         error: error.message,
-        actorId: request.userContext?.userId
+        actorUserProfileId: request.userContext?.userId
       });
 
       return reply.code(500).send({
@@ -665,9 +691,6 @@ export class AdminController {
   }
 
   private resolveUserEmail(request: FastifyRequest): string | undefined {
-    console.log('[DEBUG] resolveUserEmail - request.userContext:', JSON.stringify(request.userContext, null, 2));
-    console.log('[DEBUG] resolveUserEmail - request.user:', JSON.stringify((request as any).user, null, 2));
-
     const candidates: Array<string | undefined> = [
       request.userContext?.email,
       (request as any).user?.email,
@@ -676,15 +699,11 @@ export class AdminController {
       (request as any).user?.preferred_username,
     ];
 
-    console.log('[DEBUG] resolveUserEmail - candidates:', candidates);
-
     for (const value of candidates) {
       if (typeof value === 'string' && value.includes('@')) {
-        console.log('[DEBUG] resolveUserEmail - found email:', value);
         return value.trim();
       }
     }
-    console.log('[DEBUG] resolveUserEmail - no email found');
     return undefined;
   }
 }

backend/src/features/admin/api/admin.routes.ts

@@ -8,7 +8,7 @@ import { AdminController } from './admin.controller';
 import { UsersController } from './users.controller';
 import {
   CreateAdminInput,
-  AdminAuth0SubInput,
+  AdminIdInput,
   BulkCreateAdminInput,
   BulkRevokeAdminInput,
   BulkReinstateAdminInput,
@@ -17,7 +17,7 @@ import {
 } from './admin.validation';
 import {
   ListUsersQueryInput,
-  UserAuth0SubInput,
+  UserIdInput,
   UpdateTierInput,
   DeactivateUserInput,
   UpdateProfileInput,
@@ -65,14 +65,14 @@ export const adminRoutes: FastifyPluginAsync = async (fastify) => {
     handler: adminController.createAdmin.bind(adminController)
   });
 
-  // PATCH /api/admin/admins/:auth0Sub/revoke - Revoke admin access
-  fastify.patch<{ Params: AdminAuth0SubInput }>('/admin/admins/:auth0Sub/revoke', {
+  // PATCH /api/admin/admins/:id/revoke - Revoke admin access
+  fastify.patch<{ Params: AdminIdInput }>('/admin/admins/:id/revoke', {
     preHandler: [fastify.requireAdmin],
     handler: adminController.revokeAdmin.bind(adminController)
   });
 
-  // PATCH /api/admin/admins/:auth0Sub/reinstate - Restore revoked admin
-  fastify.patch<{ Params: AdminAuth0SubInput }>('/admin/admins/:auth0Sub/reinstate', {
+  // PATCH /api/admin/admins/:id/reinstate - Restore revoked admin
+  fastify.patch<{ Params: AdminIdInput }>('/admin/admins/:id/reinstate', {
     preHandler: [fastify.requireAdmin],
     handler: adminController.reinstateAdmin.bind(adminController)
   });
@@ -117,50 +117,50 @@ export const adminRoutes: FastifyPluginAsync = async (fastify) => {
     handler: usersController.listUsers.bind(usersController)
   });
 
-  // GET /api/admin/users/:auth0Sub - Get single user details
-  fastify.get<{ Params: UserAuth0SubInput }>('/admin/users/:auth0Sub', {
+  // GET /api/admin/users/:userId - Get single user details
+  fastify.get<{ Params: UserIdInput }>('/admin/users/:userId', {
     preHandler: [fastify.requireAdmin],
     handler: usersController.getUser.bind(usersController)
   });
 
-  // GET /api/admin/users/:auth0Sub/vehicles - Get user's vehicles (admin view)
-  fastify.get<{ Params: UserAuth0SubInput }>('/admin/users/:auth0Sub/vehicles', {
+  // GET /api/admin/users/:userId/vehicles - Get user's vehicles (admin view)
+  fastify.get<{ Params: UserIdInput }>('/admin/users/:userId/vehicles', {
     preHandler: [fastify.requireAdmin],
     handler: usersController.getUserVehicles.bind(usersController)
   });
 
-  // PATCH /api/admin/users/:auth0Sub/tier - Update subscription tier
-  fastify.patch<{ Params: UserAuth0SubInput; Body: UpdateTierInput }>('/admin/users/:auth0Sub/tier', {
+  // PATCH /api/admin/users/:userId/tier - Update subscription tier
+  fastify.patch<{ Params: UserIdInput; Body: UpdateTierInput }>('/admin/users/:userId/tier', {
     preHandler: [fastify.requireAdmin],
     handler: usersController.updateTier.bind(usersController)
   });
 
-  // PATCH /api/admin/users/:auth0Sub/deactivate - Soft delete user
-  fastify.patch<{ Params: UserAuth0SubInput; Body: DeactivateUserInput }>('/admin/users/:auth0Sub/deactivate', {
+  // PATCH /api/admin/users/:userId/deactivate - Soft delete user
+  fastify.patch<{ Params: UserIdInput; Body: DeactivateUserInput }>('/admin/users/:userId/deactivate', {
     preHandler: [fastify.requireAdmin],
     handler: usersController.deactivateUser.bind(usersController)
   });
 
-  // PATCH /api/admin/users/:auth0Sub/reactivate - Restore deactivated user
-  fastify.patch<{ Params: UserAuth0SubInput }>('/admin/users/:auth0Sub/reactivate', {
+  // PATCH /api/admin/users/:userId/reactivate - Restore deactivated user
+  fastify.patch<{ Params: UserIdInput }>('/admin/users/:userId/reactivate', {
     preHandler: [fastify.requireAdmin],
     handler: usersController.reactivateUser.bind(usersController)
   });
 
-  // PATCH /api/admin/users/:auth0Sub/profile - Update user email/displayName
-  fastify.patch<{ Params: UserAuth0SubInput; Body: UpdateProfileInput }>('/admin/users/:auth0Sub/profile', {
+  // PATCH /api/admin/users/:userId/profile - Update user email/displayName
+  fastify.patch<{ Params: UserIdInput; Body: UpdateProfileInput }>('/admin/users/:userId/profile', {
     preHandler: [fastify.requireAdmin],
     handler: usersController.updateProfile.bind(usersController)
   });
 
-  // PATCH /api/admin/users/:auth0Sub/promote - Promote user to admin
-  fastify.patch<{ Params: UserAuth0SubInput; Body: PromoteToAdminInput }>('/admin/users/:auth0Sub/promote', {
+  // PATCH /api/admin/users/:userId/promote - Promote user to admin
+  fastify.patch<{ Params: UserIdInput; Body: PromoteToAdminInput }>('/admin/users/:userId/promote', {
     preHandler: [fastify.requireAdmin],
     handler: usersController.promoteToAdmin.bind(usersController)
   });
 
-  // DELETE /api/admin/users/:auth0Sub - Hard delete user (permanent)
-  fastify.delete<{ Params: UserAuth0SubInput }>('/admin/users/:auth0Sub', {
+  // DELETE /api/admin/users/:userId - Hard delete user (permanent)
+  fastify.delete<{ Params: UserIdInput }>('/admin/users/:userId', {
     preHandler: [fastify.requireAdmin],
     handler: usersController.hardDeleteUser.bind(usersController)
   });

backend/src/features/admin/api/admin.validation.ts

@@ -10,8 +10,8 @@ export const createAdminSchema = z.object({
   role: z.enum(['admin', 'super_admin']).default('admin'),
 });
 
-export const adminAuth0SubSchema = z.object({
-  auth0Sub: z.string().min(1, 'auth0Sub is required'),
+export const adminIdSchema = z.object({
+  id: z.string().uuid('Invalid admin ID format'),
 });
 
 export const auditLogsQuerySchema = z.object({
@@ -29,14 +29,14 @@ export const bulkCreateAdminSchema = z.object({
 });
 
 export const bulkRevokeAdminSchema = z.object({
-  auth0Subs: z.array(z.string().min(1, 'auth0Sub cannot be empty'))
-    .min(1, 'At least one auth0Sub must be provided')
+  ids: z.array(z.string().uuid('Invalid admin ID format'))
+    .min(1, 'At least one admin ID must be provided')
     .max(100, 'Maximum 100 admins per batch'),
 });
 
 export const bulkReinstateAdminSchema = z.object({
-  auth0Subs: z.array(z.string().min(1, 'auth0Sub cannot be empty'))
-    .min(1, 'At least one auth0Sub must be provided')
+  ids: z.array(z.string().uuid('Invalid admin ID format'))
+    .min(1, 'At least one admin ID must be provided')
     .max(100, 'Maximum 100 admins per batch'),
 });
 
@@ -49,7 +49,7 @@ export const bulkDeleteCatalogSchema = z.object({
 });
 
 export type CreateAdminInput = z.infer<typeof createAdminSchema>;
-export type AdminAuth0SubInput = z.infer<typeof adminAuth0SubSchema>;
+export type AdminIdInput = z.infer<typeof adminIdSchema>;
 export type AuditLogsQueryInput = z.infer<typeof auditLogsQuerySchema>;
 export type BulkCreateAdminInput = z.infer<typeof bulkCreateAdminSchema>;
 export type BulkRevokeAdminInput = z.infer<typeof bulkRevokeAdminSchema>;

backend/src/features/admin/api/users.controller.ts

@@ -14,13 +14,13 @@ import { pool } from '../../../core/config/database';
 import { logger } from '../../../core/logging/logger';
 import {
   listUsersQuerySchema,
-  userAuth0SubSchema,
+  userIdSchema,
   updateTierSchema,
   deactivateUserSchema,
   updateProfileSchema,
   promoteToAdminSchema,
   ListUsersQueryInput,
-  UserAuth0SubInput,
+  UserIdInput,
   UpdateTierInput,
   DeactivateUserInput,
   UpdateProfileInput,
@@ -95,10 +95,10 @@ export class UsersController {
   }
 
   /**
-   * GET /api/admin/users/:auth0Sub/vehicles - Get user's vehicles (admin view)
+   * GET /api/admin/users/:userId/vehicles - Get user's vehicles (admin view)
    */
   async getUserVehicles(
-    request: FastifyRequest<{ Params: UserAuth0SubInput }>,
+    request: FastifyRequest<{ Params: UserIdInput }>,
     reply: FastifyReply
   ) {
     try {
@@ -119,7 +119,7 @@ export class UsersController {
       }
 
       // Validate path param
-      const parseResult = userAuth0SubSchema.safeParse(request.params);
+      const parseResult = userIdSchema.safeParse(request.params);
       if (!parseResult.success) {
         return reply.code(400).send({
           error: 'Validation error',
@@ -127,14 +127,14 @@ export class UsersController {
         });
       }
 
-      const { auth0Sub } = parseResult.data;
-      const vehicles = await this.userProfileRepository.getUserVehiclesForAdmin(auth0Sub);
+      const { userId } = parseResult.data;
+      const vehicles = await this.userProfileRepository.getUserVehiclesForAdmin(userId);
 
       return reply.code(200).send({ vehicles });
     } catch (error) {
       logger.error('Error getting user vehicles', {
         error: error instanceof Error ? error.message : 'Unknown error',
-        auth0Sub: request.params?.auth0Sub,
+        userId: (request.params as any)?.userId,
       });
 
       return reply.code(500).send({
@@ -186,10 +186,10 @@ export class UsersController {
   }
 
   /**
-   * GET /api/admin/users/:auth0Sub - Get single user details
+   * GET /api/admin/users/:userId - Get single user details
    */
   async getUser(
-    request: FastifyRequest<{ Params: UserAuth0SubInput }>,
+    request: FastifyRequest<{ Params: UserIdInput }>,
     reply: FastifyReply
   ) {
     try {
@@ -202,7 +202,7 @@ export class UsersController {
       }
 
       // Validate path param
-      const parseResult = userAuth0SubSchema.safeParse(request.params);
+      const parseResult = userIdSchema.safeParse(request.params);
       if (!parseResult.success) {
         return reply.code(400).send({
           error: 'Validation error',
@@ -210,8 +210,8 @@ export class UsersController {
         });
       }
 
-      const { auth0Sub } = parseResult.data;
-      const user = await this.userProfileService.getUserDetails(auth0Sub);
+      const { userId } = parseResult.data;
+      const user = await this.userProfileService.getUserDetails(userId);
 
       if (!user) {
         return reply.code(404).send({
@@ -224,7 +224,7 @@ export class UsersController {
     } catch (error) {
       logger.error('Error getting user details', {
         error: error instanceof Error ? error.message : 'Unknown error',
-        auth0Sub: request.params?.auth0Sub,
+        userId: (request.params as any)?.userId,
       });
 
       return reply.code(500).send({
@@ -235,12 +235,12 @@ export class UsersController {
   }
 
   /**
-   * PATCH /api/admin/users/:auth0Sub/tier - Update subscription tier
+   * PATCH /api/admin/users/:userId/tier - Update subscription tier
    * Uses subscriptionsService.adminOverrideTier() to sync both subscriptions.tier
    * and user_profiles.subscription_tier atomically
    */
   async updateTier(
-    request: FastifyRequest<{ Params: UserAuth0SubInput; Body: UpdateTierInput }>,
+    request: FastifyRequest<{ Params: UserIdInput; Body: UpdateTierInput }>,
     reply: FastifyReply
   ) {
     try {
@@ -253,7 +253,7 @@ export class UsersController {
       }
 
       // Validate path param
-      const paramsResult = userAuth0SubSchema.safeParse(request.params);
+      const paramsResult = userIdSchema.safeParse(request.params);
       if (!paramsResult.success) {
         return reply.code(400).send({
           error: 'Validation error',
@@ -270,11 +270,11 @@ export class UsersController {
         });
       }
 
-      const { auth0Sub } = paramsResult.data;
+      const { userId } = paramsResult.data;
       const { subscriptionTier } = bodyResult.data;
 
       // Verify user exists before attempting tier change
-      const currentUser = await this.userProfileService.getUserDetails(auth0Sub);
+      const currentUser = await this.userProfileService.getUserDetails(userId);
       if (!currentUser) {
         return reply.code(404).send({
           error: 'Not found',
@@ -285,34 +285,34 @@ export class UsersController {
       const previousTier = currentUser.subscriptionTier;
 
       // Use subscriptionsService to update both tables atomically
-      await this.subscriptionsService.adminOverrideTier(auth0Sub, subscriptionTier);
+      await this.subscriptionsService.adminOverrideTier(userId, subscriptionTier);
 
       // Log audit action
       await this.adminRepository.logAuditAction(
         actorId,
         'UPDATE_TIER',
-        auth0Sub,
+        userId,
         'user_profile',
         currentUser.id,
         { previousTier, newTier: subscriptionTier }
       );
 
       logger.info('User subscription tier updated via admin', {
-        auth0Sub,
+        userId,
         previousTier,
         newTier: subscriptionTier,
-        actorAuth0Sub: actorId,
+        actorId,
       });
 
       // Return updated user profile
-      const updatedUser = await this.userProfileService.getUserDetails(auth0Sub);
+      const updatedUser = await this.userProfileService.getUserDetails(userId);
       return reply.code(200).send(updatedUser);
     } catch (error) {
       const errorMessage = error instanceof Error ? error.message : 'Unknown error';
 
       logger.error('Error updating user tier', {
         error: errorMessage,
-        auth0Sub: request.params?.auth0Sub,
+        userId: (request.params as any)?.userId,
       });
 
       if (errorMessage === 'User not found') {
@@ -330,10 +330,10 @@ export class UsersController {
   }
 
   /**
-   * PATCH /api/admin/users/:auth0Sub/deactivate - Soft delete user
+   * PATCH /api/admin/users/:userId/deactivate - Soft delete user
    */
   async deactivateUser(
-    request: FastifyRequest<{ Params: UserAuth0SubInput; Body: DeactivateUserInput }>,
+    request: FastifyRequest<{ Params: UserIdInput; Body: DeactivateUserInput }>,
     reply: FastifyReply
   ) {
     try {
@@ -346,7 +346,7 @@ export class UsersController {
       }
 
       // Validate path param
-      const paramsResult = userAuth0SubSchema.safeParse(request.params);
+      const paramsResult = userIdSchema.safeParse(request.params);
       if (!paramsResult.success) {
         return reply.code(400).send({
           error: 'Validation error',
@@ -363,11 +363,11 @@ export class UsersController {
         });
       }
 
-      const { auth0Sub } = paramsResult.data;
+      const { userId } = paramsResult.data;
       const { reason } = bodyResult.data;
 
       const deactivatedUser = await this.userProfileService.deactivateUser(
-        auth0Sub,
+        userId,
         actorId,
         reason
       );
@@ -378,7 +378,7 @@ export class UsersController {
 
       logger.error('Error deactivating user', {
         error: errorMessage,
-        auth0Sub: request.params?.auth0Sub,
+        userId: (request.params as any)?.userId,
       });
 
       if (errorMessage === 'User not found') {
@@ -410,10 +410,10 @@ export class UsersController {
   }
 
   /**
-   * PATCH /api/admin/users/:auth0Sub/reactivate - Restore deactivated user
+   * PATCH /api/admin/users/:userId/reactivate - Restore deactivated user
    */
   async reactivateUser(
-    request: FastifyRequest<{ Params: UserAuth0SubInput }>,
+    request: FastifyRequest<{ Params: UserIdInput }>,
     reply: FastifyReply
   ) {
     try {
@@ -426,7 +426,7 @@ export class UsersController {
       }
 
       // Validate path param
-      const paramsResult = userAuth0SubSchema.safeParse(request.params);
+      const paramsResult = userIdSchema.safeParse(request.params);
       if (!paramsResult.success) {
         return reply.code(400).send({
           error: 'Validation error',
@@ -434,10 +434,10 @@ export class UsersController {
         });
       }
 
-      const { auth0Sub } = paramsResult.data;
+      const { userId } = paramsResult.data;
 
       const reactivatedUser = await this.userProfileService.reactivateUser(
-        auth0Sub,
+        userId,
         actorId
       );
 
@@ -447,7 +447,7 @@ export class UsersController {
 
       logger.error('Error reactivating user', {
         error: errorMessage,
-        auth0Sub: request.params?.auth0Sub,
+        userId: (request.params as any)?.userId,
       });
 
       if (errorMessage === 'User not found') {
@@ -472,10 +472,10 @@ export class UsersController {
   }
 
   /**
-   * PATCH /api/admin/users/:auth0Sub/profile - Update user email/displayName
+   * PATCH /api/admin/users/:userId/profile - Update user email/displayName
    */
   async updateProfile(
-    request: FastifyRequest<{ Params: UserAuth0SubInput; Body: UpdateProfileInput }>,
+    request: FastifyRequest<{ Params: UserIdInput; Body: UpdateProfileInput }>,
     reply: FastifyReply
   ) {
     try {
@@ -488,7 +488,7 @@ export class UsersController {
       }
 
       // Validate path param
-      const paramsResult = userAuth0SubSchema.safeParse(request.params);
+      const paramsResult = userIdSchema.safeParse(request.params);
       if (!paramsResult.success) {
         return reply.code(400).send({
           error: 'Validation error',
@@ -505,11 +505,11 @@ export class UsersController {
         });
       }
 
-      const { auth0Sub } = paramsResult.data;
+      const { userId } = paramsResult.data;
       const updates = bodyResult.data;
 
       const updatedUser = await this.userProfileService.adminUpdateProfile(
-        auth0Sub,
+        userId,
         updates,
         actorId
       );
@@ -520,7 +520,7 @@ export class UsersController {
 
       logger.error('Error updating user profile', {
         error: errorMessage,
-        auth0Sub: request.params?.auth0Sub,
+        userId: (request.params as any)?.userId,
       });
 
       if (errorMessage === 'User not found') {
@@ -538,10 +538,10 @@ export class UsersController {
   }
 
   /**
-   * PATCH /api/admin/users/:auth0Sub/promote - Promote user to admin
+   * PATCH /api/admin/users/:userId/promote - Promote user to admin
    */
   async promoteToAdmin(
-    request: FastifyRequest<{ Params: UserAuth0SubInput; Body: PromoteToAdminInput }>,
+    request: FastifyRequest<{ Params: UserIdInput; Body: PromoteToAdminInput }>,
     reply: FastifyReply
   ) {
     try {
@@ -554,7 +554,7 @@ export class UsersController {
       }
 
       // Validate path param
-      const paramsResult = userAuth0SubSchema.safeParse(request.params);
+      const paramsResult = userIdSchema.safeParse(request.params);
       if (!paramsResult.success) {
         return reply.code(400).send({
           error: 'Validation error',
@@ -571,11 +571,11 @@ export class UsersController {
         });
       }
 
-      const { auth0Sub } = paramsResult.data;
+      const { userId } = paramsResult.data;
       const { role } = bodyResult.data;
 
-      // Get the user profile first to verify they exist and get their email
-      const user = await this.userProfileService.getUserDetails(auth0Sub);
+      // Get the user profile to verify they exist and get their email
+      const user = await this.userProfileService.getUserDetails(userId);
       if (!user) {
         return reply.code(404).send({
           error: 'Not found',
@@ -591,12 +591,15 @@ export class UsersController {
         });
       }
 
-      // Create the admin record using the user's real auth0Sub
+      // Get actor's admin record for audit trail
+      const actorAdmin = await this.adminService.getAdminByUserProfileId(actorId);
+
+      // Create the admin record using the user's UUID
       const adminUser = await this.adminService.createAdmin(
         user.email,
         role,
-        auth0Sub, // Use the real auth0Sub from the user profile
-        actorId
+        userId,
+        actorAdmin?.id || actorId
       );
 
       return reply.code(201).send(adminUser);
@@ -605,7 +608,7 @@ export class UsersController {
 
       logger.error('Error promoting user to admin', {
         error: errorMessage,
-        auth0Sub: request.params?.auth0Sub,
+        userId: (request.params as any)?.userId,
       });
 
       if (errorMessage.includes('already exists')) {
@@ -623,10 +626,10 @@ export class UsersController {
   }
 
   /**
-   * DELETE /api/admin/users/:auth0Sub - Hard delete user (permanent)
+   * DELETE /api/admin/users/:userId - Hard delete user (permanent)
    */
   async hardDeleteUser(
-    request: FastifyRequest<{ Params: UserAuth0SubInput }>,
+    request: FastifyRequest<{ Params: UserIdInput }>,
     reply: FastifyReply
   ) {
     try {
@@ -639,7 +642,7 @@ export class UsersController {
       }
 
       // Validate path param
-      const paramsResult = userAuth0SubSchema.safeParse(request.params);
+      const paramsResult = userIdSchema.safeParse(request.params);
       if (!paramsResult.success) {
         return reply.code(400).send({
           error: 'Validation error',
@@ -647,14 +650,14 @@ export class UsersController {
         });
       }
 
-      const { auth0Sub } = paramsResult.data;
+      const { userId } = paramsResult.data;
 
       // Optional reason from query params
       const reason = (request.query as any)?.reason;
 
       // Hard delete user
       await this.userProfileService.adminHardDeleteUser(
-        auth0Sub,
+        userId,
         actorId,
         reason
       );
@@ -667,7 +670,7 @@ export class UsersController {
 
       logger.error('Error hard deleting user', {
         error: errorMessage,
-        auth0Sub: request.params?.auth0Sub,
+        userId: (request.params as any)?.userId,
       });
 
       if (errorMessage === 'Cannot delete your own account') {

backend/src/features/admin/api/users.validation.ts

@@ -19,9 +19,9 @@ export const listUsersQuerySchema = z.object({
   sortOrder: z.enum(['asc', 'desc']).default('desc'),
 });
 
-// Path param for user auth0Sub
-export const userAuth0SubSchema = z.object({
-  auth0Sub: z.string().min(1, 'auth0Sub is required'),
+// Path param for user UUID
+export const userIdSchema = z.object({
+  userId: z.string().uuid('Invalid user ID format'),
 });
 
 // Body for updating subscription tier
@@ -50,7 +50,7 @@ export const promoteToAdminSchema = z.object({
 
 // Type exports
 export type ListUsersQueryInput = z.infer<typeof listUsersQuerySchema>;
-export type UserAuth0SubInput = z.infer<typeof userAuth0SubSchema>;
+export type UserIdInput = z.infer<typeof userIdSchema>;
 export type UpdateTierInput = z.infer<typeof updateTierSchema>;
 export type DeactivateUserInput = z.infer<typeof deactivateUserSchema>;
 export type UpdateProfileInput = z.infer<typeof updateProfileSchema>;

backend/src/features/admin/data/admin.repository.ts

@@ -10,29 +10,49 @@ import { logger } from '../../../core/logging/logger';
 export class AdminRepository {
   constructor(private pool: Pool) {}
 
-  async getAdminByAuth0Sub(auth0Sub: string): Promise<AdminUser | null> {
+  async getAdminById(id: string): Promise<AdminUser | null> {
     const query = `
-      SELECT auth0_sub, email, role, created_at, created_by, revoked_at, updated_at
+      SELECT id, user_profile_id, email, role, created_at, created_by, revoked_at, updated_at
       FROM admin_users
-      WHERE auth0_sub = $1
+      WHERE id = $1
       LIMIT 1
     `;
 
     try {
-      const result = await this.pool.query(query, [auth0Sub]);
+      const result = await this.pool.query(query, [id]);
       if (result.rows.length === 0) {
         return null;
       }
       return this.mapRowToAdminUser(result.rows[0]);
     } catch (error) {
-      logger.error('Error fetching admin by auth0_sub', { error, auth0Sub });
+      logger.error('Error fetching admin by id', { error, id });
+      throw error;
+    }
+  }
+
+  async getAdminByUserProfileId(userProfileId: string): Promise<AdminUser | null> {
+    const query = `
+      SELECT id, user_profile_id, email, role, created_at, created_by, revoked_at, updated_at
+      FROM admin_users
+      WHERE user_profile_id = $1
+      LIMIT 1
+    `;
+
+    try {
+      const result = await this.pool.query(query, [userProfileId]);
+      if (result.rows.length === 0) {
+        return null;
+      }
+      return this.mapRowToAdminUser(result.rows[0]);
+    } catch (error) {
+      logger.error('Error fetching admin by user_profile_id', { error, userProfileId });
       throw error;
     }
   }
 
   async getAdminByEmail(email: string): Promise<AdminUser | null> {
     const query = `
-      SELECT auth0_sub, email, role, created_at, created_by, revoked_at, updated_at
+      SELECT id, user_profile_id, email, role, created_at, created_by, revoked_at, updated_at
       FROM admin_users
       WHERE LOWER(email) = LOWER($1)
       LIMIT 1
@@ -52,7 +72,7 @@ export class AdminRepository {
 
   async getAllAdmins(): Promise<AdminUser[]> {
     const query = `
-      SELECT auth0_sub, email, role, created_at, created_by, revoked_at, updated_at
+      SELECT id, user_profile_id, email, role, created_at, created_by, revoked_at, updated_at
       FROM admin_users
       ORDER BY created_at DESC
     `;
@@ -68,7 +88,7 @@ export class AdminRepository {
 
   async getActiveAdmins(): Promise<AdminUser[]> {
     const query = `
-      SELECT auth0_sub, email, role, created_at, created_by, revoked_at, updated_at
+      SELECT id, user_profile_id, email, role, created_at, created_by, revoked_at, updated_at
       FROM admin_users
       WHERE revoked_at IS NULL
       ORDER BY created_at DESC
@@ -83,61 +103,61 @@ export class AdminRepository {
     }
   }
 
-  async createAdmin(auth0Sub: string, email: string, role: string, createdBy: string): Promise<AdminUser> {
+  async createAdmin(userProfileId: string, email: string, role: string, createdBy: string): Promise<AdminUser> {
     const query = `
-      INSERT INTO admin_users (auth0_sub, email, role, created_by)
+      INSERT INTO admin_users (user_profile_id, email, role, created_by)
       VALUES ($1, $2, $3, $4)
-      RETURNING auth0_sub, email, role, created_at, created_by, revoked_at, updated_at
+      RETURNING id, user_profile_id, email, role, created_at, created_by, revoked_at, updated_at
     `;
 
     try {
-      const result = await this.pool.query(query, [auth0Sub, email, role, createdBy]);
+      const result = await this.pool.query(query, [userProfileId, email, role, createdBy]);
       if (result.rows.length === 0) {
         throw new Error('Failed to create admin user');
       }
       return this.mapRowToAdminUser(result.rows[0]);
     } catch (error) {
-      logger.error('Error creating admin', { error, auth0Sub, email });
+      logger.error('Error creating admin', { error, userProfileId, email });
       throw error;
     }
   }
 
-  async revokeAdmin(auth0Sub: string): Promise<AdminUser> {
+  async revokeAdmin(id: string): Promise<AdminUser> {
     const query = `
       UPDATE admin_users
       SET revoked_at = CURRENT_TIMESTAMP
-      WHERE auth0_sub = $1
-      RETURNING auth0_sub, email, role, created_at, created_by, revoked_at, updated_at
+      WHERE id = $1
+      RETURNING id, user_profile_id, email, role, created_at, created_by, revoked_at, updated_at
     `;
 
     try {
-      const result = await this.pool.query(query, [auth0Sub]);
+      const result = await this.pool.query(query, [id]);
       if (result.rows.length === 0) {
         throw new Error('Admin user not found');
       }
       return this.mapRowToAdminUser(result.rows[0]);
     } catch (error) {
-      logger.error('Error revoking admin', { error, auth0Sub });
+      logger.error('Error revoking admin', { error, id });
       throw error;
     }
   }
 
-  async reinstateAdmin(auth0Sub: string): Promise<AdminUser> {
+  async reinstateAdmin(id: string): Promise<AdminUser> {
     const query = `
       UPDATE admin_users
       SET revoked_at = NULL
-      WHERE auth0_sub = $1
-      RETURNING auth0_sub, email, role, created_at, created_by, revoked_at, updated_at
+      WHERE id = $1
+      RETURNING id, user_profile_id, email, role, created_at, created_by, revoked_at, updated_at
     `;
 
     try {
-      const result = await this.pool.query(query, [auth0Sub]);
+      const result = await this.pool.query(query, [id]);
       if (result.rows.length === 0) {
         throw new Error('Admin user not found');
       }
       return this.mapRowToAdminUser(result.rows[0]);
     } catch (error) {
-      logger.error('Error reinstating admin', { error, auth0Sub });
+      logger.error('Error reinstating admin', { error, id });
       throw error;
     }
   }
@@ -202,30 +222,11 @@ export class AdminRepository {
     }
   }
 
-  async updateAuth0SubByEmail(email: string, auth0Sub: string): Promise<AdminUser> {
-    const query = `
-      UPDATE admin_users
-      SET auth0_sub = $1,
-          updated_at = CURRENT_TIMESTAMP
-      WHERE LOWER(email) = LOWER($2)
-      RETURNING auth0_sub, email, role, created_at, created_by, revoked_at, updated_at
-    `;
-
-    try {
-      const result = await this.pool.query(query, [auth0Sub, email]);
-      if (result.rows.length === 0) {
-        throw new Error(`Admin user with email ${email} not found`);
-      }
-      return this.mapRowToAdminUser(result.rows[0]);
-    } catch (error) {
-      logger.error('Error updating admin auth0_sub by email', { error, email, auth0Sub });
-      throw error;
-    }
-  }
 
   private mapRowToAdminUser(row: any): AdminUser {
     return {
-      auth0Sub: row.auth0_sub,
+      id: row.id,
+      userProfileId: row.user_profile_id,
       email: row.email,
       role: row.role,
       createdAt: new Date(row.created_at),

backend/src/features/admin/domain/admin.service.ts

@@ -11,11 +11,20 @@ import { auditLogService } from '../../audit-log';
 export class AdminService {
   constructor(private repository: AdminRepository) {}
 
-  async getAdminByAuth0Sub(auth0Sub: string): Promise<AdminUser | null> {
+  async getAdminById(id: string): Promise<AdminUser | null> {
     try {
-      return await this.repository.getAdminByAuth0Sub(auth0Sub);
+      return await this.repository.getAdminById(id);
     } catch (error) {
-      logger.error('Error getting admin by auth0_sub', { error });
+      logger.error('Error getting admin by id', { error });
+      throw error;
+    }
+  }
+
+  async getAdminByUserProfileId(userProfileId: string): Promise<AdminUser | null> {
+    try {
+      return await this.repository.getAdminByUserProfileId(userProfileId);
+    } catch (error) {
+      logger.error('Error getting admin by user_profile_id', { error });
       throw error;
     }
   }
@@ -47,7 +56,7 @@ export class AdminService {
     }
   }
 
-  async createAdmin(email: string, role: string, auth0Sub: string, createdBy: string): Promise<AdminUser> {
+  async createAdmin(email: string, role: string, userProfileId: string, createdByAdminId: string): Promise<AdminUser> {
     try {
       // Check if admin already exists
       const normalizedEmail = email.trim().toLowerCase();
@@ -57,10 +66,10 @@ export class AdminService {
       }
 
       // Create new admin
-      const admin = await this.repository.createAdmin(auth0Sub, normalizedEmail, role, createdBy);
+      const admin = await this.repository.createAdmin(userProfileId, normalizedEmail, role, createdByAdminId);
 
       // Log audit action (legacy)
-      await this.repository.logAuditAction(createdBy, 'CREATE', admin.auth0Sub, 'admin_user', admin.email, {
+      await this.repository.logAuditAction(createdByAdminId, 'CREATE', admin.id, 'admin_user', admin.email, {
         email,
         role
       });
@@ -68,10 +77,10 @@ export class AdminService {
       // Log to unified audit log
       await auditLogService.info(
         'admin',
-        createdBy,
+        userProfileId,
         `Admin user created: ${admin.email}`,
         'admin_user',
-        admin.auth0Sub,
+        admin.id,
         { email: admin.email, role }
       ).catch(err => logger.error('Failed to log admin create audit event', { error: err }));
 
@@ -83,7 +92,7 @@ export class AdminService {
     }
   }
 
-  async revokeAdmin(auth0Sub: string, revokedBy: string): Promise<AdminUser> {
+  async revokeAdmin(id: string, revokedByAdminId: string): Promise<AdminUser> {
     try {
       // Check that at least one active admin will remain
       const activeAdmins = await this.repository.getActiveAdmins();
@@ -92,51 +101,51 @@ export class AdminService {
       }
 
       // Revoke the admin
-      const admin = await this.repository.revokeAdmin(auth0Sub);
+      const admin = await this.repository.revokeAdmin(id);
 
       // Log audit action (legacy)
-      await this.repository.logAuditAction(revokedBy, 'REVOKE', auth0Sub, 'admin_user', admin.email);
+      await this.repository.logAuditAction(revokedByAdminId, 'REVOKE', id, 'admin_user', admin.email);
 
       // Log to unified audit log
       await auditLogService.info(
         'admin',
-        revokedBy,
+        admin.userProfileId,
         `Admin user revoked: ${admin.email}`,
         'admin_user',
-        auth0Sub,
+        id,
         { email: admin.email }
       ).catch(err => logger.error('Failed to log admin revoke audit event', { error: err }));
 
-      logger.info('Admin user revoked', { auth0Sub, email: admin.email });
+      logger.info('Admin user revoked', { id, email: admin.email });
       return admin;
     } catch (error) {
-      logger.error('Error revoking admin', { error, auth0Sub });
+      logger.error('Error revoking admin', { error, id });
       throw error;
     }
   }
 
-  async reinstateAdmin(auth0Sub: string, reinstatedBy: string): Promise<AdminUser> {
+  async reinstateAdmin(id: string, reinstatedByAdminId: string): Promise<AdminUser> {
     try {
       // Reinstate the admin
-      const admin = await this.repository.reinstateAdmin(auth0Sub);
+      const admin = await this.repository.reinstateAdmin(id);
 
       // Log audit action (legacy)
-      await this.repository.logAuditAction(reinstatedBy, 'REINSTATE', auth0Sub, 'admin_user', admin.email);
+      await this.repository.logAuditAction(reinstatedByAdminId, 'REINSTATE', id, 'admin_user', admin.email);
 
       // Log to unified audit log
       await auditLogService.info(
         'admin',
-        reinstatedBy,
+        admin.userProfileId,
         `Admin user reinstated: ${admin.email}`,
         'admin_user',
-        auth0Sub,
+        id,
         { email: admin.email }
       ).catch(err => logger.error('Failed to log admin reinstate audit event', { error: err }));
 
-      logger.info('Admin user reinstated', { auth0Sub, email: admin.email });
+      logger.info('Admin user reinstated', { id, email: admin.email });
       return admin;
     } catch (error) {
-      logger.error('Error reinstating admin', { error, auth0Sub });
+      logger.error('Error reinstating admin', { error, id });
       throw error;
     }
   }
@@ -150,12 +159,4 @@ export class AdminService {
     }
   }
 
-  async linkAdminAuth0Sub(email: string, auth0Sub: string): Promise<AdminUser> {
-    try {
-      return await this.repository.updateAuth0SubByEmail(email.trim().toLowerCase(), auth0Sub);
-    } catch (error) {
-      logger.error('Error linking admin auth0_sub to email', { error, email, auth0Sub });
-      throw error;
-    }
-  }
 }

backend/src/features/admin/domain/admin.types.ts

@@ -4,7 +4,8 @@
  */
 
 export interface AdminUser {
-  auth0Sub: string;
+  id: string;
+  userProfileId: string;
   email: string;
   role: 'admin' | 'super_admin';
   createdAt: Date;
@@ -19,11 +20,11 @@ export interface CreateAdminRequest {
 }
 
 export interface RevokeAdminRequest {
-  auth0Sub: string;
+  id: string;
 }
 
 export interface ReinstateAdminRequest {
-  auth0Sub: string;
+  id: string;
 }
 
 export interface AdminAuditLog {
@@ -71,25 +72,25 @@ export interface BulkCreateAdminResponse {
 }
 
 export interface BulkRevokeAdminRequest {
-  auth0Subs: string[];
+  ids: string[];
 }
 
 export interface BulkRevokeAdminResponse {
   revoked: AdminUser[];
   failed: Array<{
-    auth0Sub: string;
+    id: string;
     error: string;
   }>;
 }
 
 export interface BulkReinstateAdminRequest {
-  auth0Subs: string[];
+  ids: string[];
 }
 
 export interface BulkReinstateAdminResponse {
   reinstated: AdminUser[];
   failed: Array<{
-    auth0Sub: string;
+    id: string;
     error: string;
   }>;
 }

backend/src/features/admin/tests/integration/admin.integration.test.ts

@@ -4,18 +4,19 @@
  */
 
 import request from 'supertest';
-import { app } from '../../../../app';
+import { buildApp } from '../../../../app';
 import pool from '../../../../core/config/database';
+import { FastifyInstance } from 'fastify';
 import { readFileSync } from 'fs';
 import { join } from 'path';
 import fastifyPlugin from 'fastify-plugin';
 import { setAdminGuardPool } from '../../../../core/plugins/admin-guard.plugin';
 
-const DEFAULT_ADMIN_SUB = 'test-admin-123';
+const DEFAULT_ADMIN_ID = '7c9e6679-7425-40de-944b-e07fc1f90ae7';
 const DEFAULT_ADMIN_EMAIL = 'test-admin@motovaultpro.com';
 
 let currentUser = {
-  sub: DEFAULT_ADMIN_SUB,
+  sub: 'auth0|test-admin-123',
   email: DEFAULT_ADMIN_EMAIL,
 };
 
@@ -25,11 +26,15 @@ jest.mock('../../../../core/plugins/auth.plugin', () => {
     default: fastifyPlugin(async function(fastify) {
       fastify.decorate('authenticate', async function(request, _reply) {
         // Inject dynamic test user context
+        // JWT sub is still auth0|xxx format
         request.user = { sub: currentUser.sub };
         request.userContext = {
-          userId: currentUser.sub,
+          userId: DEFAULT_ADMIN_ID,
           email: currentUser.email,
+          emailVerified: true,
+          onboardingCompleted: true,
           isAdmin: false, // Will be set by admin guard
+          subscriptionTier: 'free',
         };
       });
     }, { name: 'auth-plugin' })
@@ -37,10 +42,14 @@ jest.mock('../../../../core/plugins/auth.plugin', () => {
 });
 
 describe('Admin Management Integration Tests', () => {
-  let testAdminAuth0Sub: string;
-  let testNonAdminAuth0Sub: string;
+  let app: FastifyInstance;
+  let testAdminId: string;
 
   beforeAll(async () => {
+    // Build the app
+    app = await buildApp();
+    await app.ready();
+
     // Run the admin migration directly using the migration file
     const migrationFile = join(__dirname, '../../migrations/001_create_admin_users.sql');
     const migrationSQL = readFileSync(migrationFile, 'utf-8');
@@ -50,33 +59,31 @@ describe('Admin Management Integration Tests', () => {
     setAdminGuardPool(pool);
 
     // Create test admin user
-    testAdminAuth0Sub = DEFAULT_ADMIN_SUB;
+    testAdminId = DEFAULT_ADMIN_ID;
     await pool.query(`
-      INSERT INTO admin_users (auth0_sub, email, role, created_by)
-      VALUES ($1, $2, $3, $4)
-      ON CONFLICT (auth0_sub) DO NOTHING
-    `, [testAdminAuth0Sub, DEFAULT_ADMIN_EMAIL, 'admin', 'system']);
-
-    // Create test non-admin auth0Sub for permission tests
-    testNonAdminAuth0Sub = 'test-non-admin-456';
+      INSERT INTO admin_users (id, user_profile_id, email, role, created_by)
+      VALUES ($1, $2, $3, $4, $5)
+      ON CONFLICT (user_profile_id) DO NOTHING
+    `, [testAdminId, testAdminId, DEFAULT_ADMIN_EMAIL, 'admin', 'system']);
   });
 
   afterAll(async () => {
     // Clean up test database
     await pool.query('DROP TABLE IF EXISTS admin_audit_logs CASCADE');
     await pool.query('DROP TABLE IF EXISTS admin_users CASCADE');
+    await app.close();
     await pool.end();
   });
 
   beforeEach(async () => {
     // Clean up test data before each test (except the test admin)
     await pool.query(
-      'DELETE FROM admin_users WHERE auth0_sub != $1 AND auth0_sub != $2',
-      [testAdminAuth0Sub, 'system|bootstrap']
+      'DELETE FROM admin_users WHERE user_profile_id != $1',
+      [testAdminId]
     );
     await pool.query('DELETE FROM admin_audit_logs');
     currentUser = {
-      sub: DEFAULT_ADMIN_SUB,
+      sub: 'auth0|test-admin-123',
       email: DEFAULT_ADMIN_EMAIL,
     };
   });
@@ -85,11 +92,11 @@ describe('Admin Management Integration Tests', () => {
     it('should reject non-admin user trying to list admins', async () => {
       // Create mock for non-admin user
       currentUser = {
-        sub: testNonAdminAuth0Sub,
+        sub: 'auth0|test-non-admin-456',
         email: 'test-user@example.com',
       };
 
-      const response = await request(app)
+      const response = await request(app.server)
         .get('/api/admin/admins')
         .expect(403);
 
@@ -101,51 +108,51 @@ describe('Admin Management Integration Tests', () => {
   describe('GET /api/admin/verify', () => {
     it('should confirm admin access for existing admin', async () => {
       currentUser = {
-        sub: testAdminAuth0Sub,
+        sub: 'auth0|test-admin-123',
         email: DEFAULT_ADMIN_EMAIL,
       };
 
-      const response = await request(app)
+      const response = await request(app.server)
         .get('/api/admin/verify')
         .expect(200);
 
       expect(response.body.isAdmin).toBe(true);
       expect(response.body.adminRecord).toMatchObject({
-        auth0Sub: testAdminAuth0Sub,
+        id: testAdminId,
         email: DEFAULT_ADMIN_EMAIL,
       });
     });
 
-    it('should link admin record by email when auth0_sub differs', async () => {
-      const placeholderSub = 'auth0|placeholder-sub';
-      const realSub = 'auth0|real-admin-sub';
+    it('should link admin record by email when user_profile_id differs', async () => {
+      const placeholderId = '9b9a1234-1234-1234-1234-123456789abc';
+      const realId = 'a1b2c3d4-5678-90ab-cdef-123456789def';
       const email = 'link-admin@example.com';
 
       await pool.query(`
-        INSERT INTO admin_users (auth0_sub, email, role, created_by)
-        VALUES ($1, $2, $3, $4)
-      `, [placeholderSub, email, 'admin', testAdminAuth0Sub]);
+        INSERT INTO admin_users (id, user_profile_id, email, role, created_by)
+        VALUES ($1, $2, $3, $4, $5)
+      `, [placeholderId, placeholderId, email, 'admin', testAdminId]);
 
       currentUser = {
-        sub: realSub,
+        sub: 'auth0|real-admin-sub',
         email,
       };
 
-      const response = await request(app)
+      const response = await request(app.server)
         .get('/api/admin/verify')
         .expect(200);
 
       expect(response.body.isAdmin).toBe(true);
       expect(response.body.adminRecord).toMatchObject({
-        auth0Sub: realSub,
+        userProfileId: realId,
         email,
       });
 
       const record = await pool.query(
-        'SELECT auth0_sub FROM admin_users WHERE email = $1',
+        'SELECT user_profile_id FROM admin_users WHERE email = $1',
         [email]
       );
-      expect(record.rows[0].auth0_sub).toBe(realSub);
+      expect(record.rows[0].user_profile_id).toBe(realId);
     });
 
     it('should return non-admin response for unknown user', async () => {
@@ -154,7 +161,7 @@ describe('Admin Management Integration Tests', () => {
         email: 'non-admin@example.com',
       };
 
-      const response = await request(app)
+      const response = await request(app.server)
         .get('/api/admin/verify')
         .expect(200);
 
@@ -166,17 +173,19 @@ describe('Admin Management Integration Tests', () => {
   describe('GET /api/admin/admins', () => {
     it('should list all admin users', async () => {
       // Create additional test admins
+      const admin1Id = '6ba7b810-9dad-11d1-80b4-00c04fd430c8';
+      const admin2Id = '8f14e45f-ceea-367f-a27f-c9a6d0c67e0e';
       await pool.query(`
-        INSERT INTO admin_users (auth0_sub, email, role, created_by)
+        INSERT INTO admin_users (id, user_profile_id, email, role, created_by)
         VALUES
-        ($1, $2, $3, $4),
-        ($5, $6, $7, $8)
+        ($1, $2, $3, $4, $5),
+        ($6, $7, $8, $9, $10)
       `, [
-        'auth0|admin1', 'admin1@example.com', 'admin', testAdminAuth0Sub,
-        'auth0|admin2', 'admin2@example.com', 'super_admin', testAdminAuth0Sub
+        admin1Id, admin1Id, 'admin1@example.com', 'admin', testAdminId,
+        admin2Id, admin2Id, 'admin2@example.com', 'super_admin', testAdminId
       ]);
 
-      const response = await request(app)
+      const response = await request(app.server)
         .get('/api/admin/admins')
         .expect(200);
 
@@ -184,7 +193,7 @@ describe('Admin Management Integration Tests', () => {
       expect(response.body).toHaveProperty('admins');
       expect(response.body.admins.length).toBeGreaterThanOrEqual(3); // At least test admin + 2 created
       expect(response.body.admins[0]).toMatchObject({
-        auth0Sub: expect.any(String),
+        id: expect.any(String),
         email: expect.any(String),
         role: expect.stringMatching(/^(admin|super_admin)$/),
         createdAt: expect.any(String),
@@ -194,12 +203,13 @@ describe('Admin Management Integration Tests', () => {
 
     it('should include revoked admins in the list', async () => {
       // Create and revoke an admin
+      const revokedId = 'f1e2d3c4-b5a6-9788-6543-210fedcba987';
       await pool.query(`
-        INSERT INTO admin_users (auth0_sub, email, role, created_by, revoked_at)
-        VALUES ($1, $2, $3, $4, CURRENT_TIMESTAMP)
-      `, ['auth0|revoked', 'revoked@example.com', 'admin', testAdminAuth0Sub]);
+        INSERT INTO admin_users (id, user_profile_id, email, role, created_by, revoked_at)
+        VALUES ($1, $2, $3, $4, $5, CURRENT_TIMESTAMP)
+      `, [revokedId, revokedId, 'revoked@example.com', 'admin', testAdminId]);
 
-      const response = await request(app)
+      const response = await request(app.server)
         .get('/api/admin/admins')
         .expect(200);
 
@@ -218,17 +228,17 @@ describe('Admin Management Integration Tests', () => {
         role: 'admin'
       };
 
-      const response = await request(app)
+      const response = await request(app.server)
         .post('/api/admin/admins')
         .send(newAdminData)
         .expect(201);
 
       expect(response.body).toMatchObject({
-        auth0Sub: expect.any(String),
+        id: expect.any(String),
         email: 'newadmin@example.com',
         role: 'admin',
         createdAt: expect.any(String),
-        createdBy: testAdminAuth0Sub,
+        createdBy: testAdminId,
         revokedAt: null
       });
 
@@ -238,7 +248,7 @@ describe('Admin Management Integration Tests', () => {
         ['CREATE', 'newadmin@example.com']
       );
       expect(auditResult.rows.length).toBe(1);
-      expect(auditResult.rows[0].actor_admin_id).toBe(testAdminAuth0Sub);
+      expect(auditResult.rows[0].actor_admin_id).toBe(testAdminId);
     });
 
     it('should reject invalid email', async () => {
@@ -247,7 +257,7 @@ describe('Admin Management Integration Tests', () => {
         role: 'admin'
       };
 
-      const response = await request(app)
+      const response = await request(app.server)
         .post('/api/admin/admins')
         .send(invalidData)
         .expect(400);
@@ -263,13 +273,13 @@ describe('Admin Management Integration Tests', () => {
       };
 
       // Create first admin
-      await request(app)
+      await request(app.server)
         .post('/api/admin/admins')
         .send(adminData)
         .expect(201);
 
       // Try to create duplicate
-      const response = await request(app)
+      const response = await request(app.server)
         .post('/api/admin/admins')
         .send(adminData)
         .expect(400);
@@ -284,7 +294,7 @@ describe('Admin Management Integration Tests', () => {
         role: 'super_admin'
       };
 
-      const response = await request(app)
+      const response = await request(app.server)
         .post('/api/admin/admins')
         .send(superAdminData)
         .expect(201);
@@ -297,7 +307,7 @@ describe('Admin Management Integration Tests', () => {
         email: 'defaultrole@example.com'
       };
 
-      const response = await request(app)
+      const response = await request(app.server)
         .post('/api/admin/admins')
         .send(adminData)
         .expect(201);
@@ -306,23 +316,24 @@ describe('Admin Management Integration Tests', () => {
     });
   });
 
-  describe('PATCH /api/admin/admins/:auth0Sub/revoke', () => {
+  describe('PATCH /api/admin/admins/:id/revoke', () => {
     it('should revoke admin access', async () => {
       // Create admin to revoke
+      const toRevokeId = 'b1c2d3e4-f5a6-7890-1234-567890abcdef';
       const createResult = await pool.query(`
-        INSERT INTO admin_users (auth0_sub, email, role, created_by)
-        VALUES ($1, $2, $3, $4)
-        RETURNING auth0_sub
-      `, ['auth0|to-revoke', 'torevoke@example.com', 'admin', testAdminAuth0Sub]);
+        INSERT INTO admin_users (id, user_profile_id, email, role, created_by)
+        VALUES ($1, $2, $3, $4, $5)
+        RETURNING id
+      `, [toRevokeId, toRevokeId, 'torevoke@example.com', 'admin', testAdminId]);
 
-      const auth0Sub = createResult.rows[0].auth0_sub;
+      const adminId = createResult.rows[0].id;
 
-      const response = await request(app)
-        .patch(`/api/admin/admins/${auth0Sub}/revoke`)
+      const response = await request(app.server)
+        .patch(`/api/admin/admins/${adminId}/revoke`)
         .expect(200);
 
       expect(response.body).toMatchObject({
-        auth0Sub,
+        id: adminId,
         email: 'torevoke@example.com',
         revokedAt: expect.any(String)
       });
@@ -330,7 +341,7 @@ describe('Admin Management Integration Tests', () => {
       // Verify audit log
       const auditResult = await pool.query(
         'SELECT * FROM admin_audit_logs WHERE action = $1 AND target_admin_id = $2',
-        ['REVOKE', auth0Sub]
+        ['REVOKE', adminId]
       );
       expect(auditResult.rows.length).toBe(1);
     });
@@ -338,12 +349,12 @@ describe('Admin Management Integration Tests', () => {
     it('should prevent revoking last active admin', async () => {
       // First, ensure only one active admin exists
       await pool.query(
-        'UPDATE admin_users SET revoked_at = CURRENT_TIMESTAMP WHERE auth0_sub != $1',
-        [testAdminAuth0Sub]
+        'UPDATE admin_users SET revoked_at = CURRENT_TIMESTAMP WHERE user_profile_id != $1',
+        [testAdminId]
       );
 
-      const response = await request(app)
-        .patch(`/api/admin/admins/${testAdminAuth0Sub}/revoke`)
+      const response = await request(app.server)
+        .patch(`/api/admin/admins/${testAdminId}/revoke`)
         .expect(400);
 
       expect(response.body.error).toBe('Bad Request');
@@ -351,8 +362,8 @@ describe('Admin Management Integration Tests', () => {
     });
 
     it('should return 404 for non-existent admin', async () => {
-      const response = await request(app)
-        .patch('/api/admin/admins/auth0|nonexistent/revoke')
+      const response = await request(app.server)
+        .patch('/api/admin/admins/00000000-0000-0000-0000-000000000000/revoke')
         .expect(404);
 
       expect(response.body.error).toBe('Not Found');
@@ -360,23 +371,24 @@ describe('Admin Management Integration Tests', () => {
     });
   });
 
-  describe('PATCH /api/admin/admins/:auth0Sub/reinstate', () => {
+  describe('PATCH /api/admin/admins/:id/reinstate', () => {
     it('should reinstate revoked admin', async () => {
       // Create revoked admin
+      const reinstateId = 'c2d3e4f5-a6b7-8901-2345-678901bcdef0';
       const createResult = await pool.query(`
-        INSERT INTO admin_users (auth0_sub, email, role, created_by, revoked_at)
-        VALUES ($1, $2, $3, $4, CURRENT_TIMESTAMP)
-        RETURNING auth0_sub
-      `, ['auth0|to-reinstate', 'toreinstate@example.com', 'admin', testAdminAuth0Sub]);
+        INSERT INTO admin_users (id, user_profile_id, email, role, created_by, revoked_at)
+        VALUES ($1, $2, $3, $4, $5, CURRENT_TIMESTAMP)
+        RETURNING id
+      `, [reinstateId, reinstateId, 'toreinstate@example.com', 'admin', testAdminId]);
 
-      const auth0Sub = createResult.rows[0].auth0_sub;
+      const adminId = createResult.rows[0].id;
 
-      const response = await request(app)
-        .patch(`/api/admin/admins/${auth0Sub}/reinstate`)
+      const response = await request(app.server)
+        .patch(`/api/admin/admins/${adminId}/reinstate`)
         .expect(200);
 
       expect(response.body).toMatchObject({
-        auth0Sub,
+        id: adminId,
         email: 'toreinstate@example.com',
         revokedAt: null
       });
@@ -384,14 +396,14 @@ describe('Admin Management Integration Tests', () => {
       // Verify audit log
       const auditResult = await pool.query(
         'SELECT * FROM admin_audit_logs WHERE action = $1 AND target_admin_id = $2',
-        ['REINSTATE', auth0Sub]
+        ['REINSTATE', adminId]
       );
       expect(auditResult.rows.length).toBe(1);
     });
 
     it('should return 404 for non-existent admin', async () => {
-      const response = await request(app)
-        .patch('/api/admin/admins/auth0|nonexistent/reinstate')
+      const response = await request(app.server)
+        .patch('/api/admin/admins/00000000-0000-0000-0000-000000000000/reinstate')
         .expect(404);
 
       expect(response.body.error).toBe('Not Found');
@@ -400,16 +412,17 @@ describe('Admin Management Integration Tests', () => {
 
     it('should handle reinstating already active admin', async () => {
       // Create active admin
+      const activeId = 'd3e4f5a6-b7c8-9012-3456-789012cdef01';
       const createResult = await pool.query(`
-        INSERT INTO admin_users (auth0_sub, email, role, created_by)
-        VALUES ($1, $2, $3, $4)
-        RETURNING auth0_sub
-      `, ['auth0|already-active', 'active@example.com', 'admin', testAdminAuth0Sub]);
+        INSERT INTO admin_users (id, user_profile_id, email, role, created_by)
+        VALUES ($1, $2, $3, $4, $5)
+        RETURNING id
+      `, [activeId, activeId, 'active@example.com', 'admin', testAdminId]);
 
-      const auth0Sub = createResult.rows[0].auth0_sub;
+      const adminId = createResult.rows[0].id;
 
-      const response = await request(app)
-        .patch(`/api/admin/admins/${auth0Sub}/reinstate`)
+      const response = await request(app.server)
+        .patch(`/api/admin/admins/${adminId}/reinstate`)
         .expect(200);
 
       expect(response.body.revokedAt).toBeNull();
@@ -426,12 +439,12 @@ describe('Admin Management Integration Tests', () => {
         ($5, $6, $7, $8),
         ($9, $10, $11, $12)
       `, [
-        testAdminAuth0Sub, 'CREATE', 'admin_user', 'test1@example.com',
-        testAdminAuth0Sub, 'REVOKE', 'admin_user', 'test2@example.com',
-        testAdminAuth0Sub, 'REINSTATE', 'admin_user', 'test3@example.com'
+        testAdminId, 'CREATE', 'admin_user', 'test1@example.com',
+        testAdminId, 'REVOKE', 'admin_user', 'test2@example.com',
+        testAdminId, 'REINSTATE', 'admin_user', 'test3@example.com'
       ]);
 
-      const response = await request(app)
+      const response = await request(app.server)
         .get('/api/admin/audit-logs')
         .expect(200);
 
@@ -440,7 +453,7 @@ describe('Admin Management Integration Tests', () => {
       expect(response.body.logs.length).toBeGreaterThanOrEqual(3);
       expect(response.body.logs[0]).toMatchObject({
         id: expect.any(String),
-        actorAdminId: testAdminAuth0Sub,
+        actorAdminId: testAdminId,
         action: expect.any(String),
         resourceType: expect.any(String),
         createdAt: expect.any(String)
@@ -453,10 +466,10 @@ describe('Admin Management Integration Tests', () => {
         await pool.query(`
           INSERT INTO admin_audit_logs (actor_admin_id, action, resource_type, resource_id)
           VALUES ($1, $2, $3, $4)
-        `, [testAdminAuth0Sub, 'CREATE', 'admin_user', `test${i}@example.com`]);
+        `, [testAdminId, 'CREATE', 'admin_user', `test${i}@example.com`]);
       }
 
-      const response = await request(app)
+      const response = await request(app.server)
         .get('/api/admin/audit-logs?limit=5&offset=0')
         .expect(200);
 
@@ -473,12 +486,12 @@ describe('Admin Management Integration Tests', () => {
         ($3, $4, CURRENT_TIMESTAMP - INTERVAL '1 minute'),
         ($5, $6, CURRENT_TIMESTAMP)
       `, [
-        testAdminAuth0Sub, 'FIRST',
-        testAdminAuth0Sub, 'SECOND',
-        testAdminAuth0Sub, 'THIRD'
+        testAdminId, 'FIRST',
+        testAdminId, 'SECOND',
+        testAdminId, 'THIRD'
       ]);
 
-      const response = await request(app)
+      const response = await request(app.server)
         .get('/api/admin/audit-logs?limit=3')
         .expect(200);
 
@@ -491,45 +504,45 @@ describe('Admin Management Integration Tests', () => {
   describe('End-to-end workflow', () => {
     it('should create, revoke, and reinstate admin with full audit trail', async () => {
       // 1. Create new admin
-      const createResponse = await request(app)
+      const createResponse = await request(app.server)
         .post('/api/admin/admins')
         .send({ email: 'workflow@example.com', role: 'admin' })
         .expect(201);
 
-      const auth0Sub = createResponse.body.auth0Sub;
+      const adminId = createResponse.body.id;
 
       // 2. Verify admin appears in list
-      const listResponse = await request(app)
+      const listResponse = await request(app.server)
         .get('/api/admin/admins')
         .expect(200);
 
       const createdAdmin = listResponse.body.admins.find(
-        (admin: any) => admin.auth0Sub === auth0Sub
+        (admin: any) => admin.id === adminId
       );
       expect(createdAdmin).toBeDefined();
       expect(createdAdmin.revokedAt).toBeNull();
 
       // 3. Revoke admin
-      const revokeResponse = await request(app)
-        .patch(`/api/admin/admins/${auth0Sub}/revoke`)
+      const revokeResponse = await request(app.server)
+        .patch(`/api/admin/admins/${adminId}/revoke`)
         .expect(200);
 
       expect(revokeResponse.body.revokedAt).toBeTruthy();
 
       // 4. Reinstate admin
-      const reinstateResponse = await request(app)
-        .patch(`/api/admin/admins/${auth0Sub}/reinstate`)
+      const reinstateResponse = await request(app.server)
+        .patch(`/api/admin/admins/${adminId}/reinstate`)
         .expect(200);
 
       expect(reinstateResponse.body.revokedAt).toBeNull();
 
       // 5. Verify complete audit trail
-      const auditResponse = await request(app)
+      const auditResponse = await request(app.server)
         .get('/api/admin/audit-logs')
         .expect(200);
 
       const workflowLogs = auditResponse.body.logs.filter(
-        (log: any) => log.targetAdminId === auth0Sub || log.resourceId === 'workflow@example.com'
+        (log: any) => log.targetAdminId === adminId || log.resourceId === 'workflow@example.com'
       );
 
       expect(workflowLogs.length).toBeGreaterThanOrEqual(3);

backend/src/features/admin/tests/unit/admin.guard.test.ts

@@ -26,7 +26,7 @@ describe('admin guard plugin', () => {
     fastify = Fastify();
     authenticateMock = jest.fn(async (request: FastifyRequest) => {
       request.userContext = {
-        userId: 'auth0|admin',
+        userId: '7c9e6679-7425-40de-944b-e07fc1f90ae7',
         email: 'admin@motovaultpro.com',
         emailVerified: true,
         onboardingCompleted: true,
@@ -41,7 +41,7 @@ describe('admin guard plugin', () => {
     mockPool = {
       query: jest.fn().mockResolvedValue({
         rows: [{
-          auth0_sub: 'auth0|admin',
+          user_profile_id: '7c9e6679-7425-40de-944b-e07fc1f90ae7',
           email: 'admin@motovaultpro.com',
           role: 'admin',
           revoked_at: null,

backend/src/features/admin/tests/unit/admin.service.test.ts

@@ -6,13 +6,23 @@
 import { AdminService } from '../../domain/admin.service';
 import { AdminRepository } from '../../data/admin.repository';
 
+// Mock the audit log service
+jest.mock('../../../audit-log', () => ({
+  auditLogService: {
+    info: jest.fn().mockResolvedValue(undefined),
+    warn: jest.fn().mockResolvedValue(undefined),
+    error: jest.fn().mockResolvedValue(undefined),
+  },
+}));
+
 describe('AdminService', () => {
   let adminService: AdminService;
   let mockRepository: jest.Mocked<AdminRepository>;
 
   beforeEach(() => {
     mockRepository = {
-      getAdminByAuth0Sub: jest.fn(),
+      getAdminById: jest.fn(),
+      getAdminByUserProfileId: jest.fn(),
       getAdminByEmail: jest.fn(),
       getAllAdmins: jest.fn(),
       getActiveAdmins: jest.fn(),
@@ -26,30 +36,31 @@ describe('AdminService', () => {
     adminService = new AdminService(mockRepository);
   });
 
-  describe('getAdminByAuth0Sub', () => {
+  describe('getAdminById', () => {
     it('should return admin when found', async () => {
       const mockAdmin = {
-        auth0Sub: 'auth0|123456',
+        id: '7c9e6679-7425-40de-944b-e07fc1f90ae7',
+        userProfileId: '7c9e6679-7425-40de-944b-e07fc1f90ae7',
         email: 'admin@motovaultpro.com',
-        role: 'admin',
+        role: 'admin' as const,
         createdAt: new Date(),
-        createdBy: 'system',
+        createdBy: '550e8400-e29b-41d4-a716-446655440000',
         revokedAt: null,
         updatedAt: new Date(),
       };
 
-      mockRepository.getAdminByAuth0Sub.mockResolvedValue(mockAdmin);
+      mockRepository.getAdminById.mockResolvedValue(mockAdmin);
 
-      const result = await adminService.getAdminByAuth0Sub('auth0|123456');
+      const result = await adminService.getAdminById('7c9e6679-7425-40de-944b-e07fc1f90ae7');
 
       expect(result).toEqual(mockAdmin);
-      expect(mockRepository.getAdminByAuth0Sub).toHaveBeenCalledWith('auth0|123456');
+      expect(mockRepository.getAdminById).toHaveBeenCalledWith('7c9e6679-7425-40de-944b-e07fc1f90ae7');
     });
 
     it('should return null when admin not found', async () => {
-      mockRepository.getAdminByAuth0Sub.mockResolvedValue(null);
+      mockRepository.getAdminById.mockResolvedValue(null);
 
-      const result = await adminService.getAdminByAuth0Sub('auth0|unknown');
+      const result = await adminService.getAdminById('00000000-0000-0000-0000-000000000000');
 
       expect(result).toBeNull();
     });
@@ -57,12 +68,15 @@ describe('AdminService', () => {
 
   describe('createAdmin', () => {
     it('should create new admin and log audit', async () => {
+      const newAdminId = '8f14e45f-ceea-367f-a27f-c9a6d0c67e0e';
+      const creatorId = '7c9e6679-7425-40de-944b-e07fc1f90ae7';
       const mockAdmin = {
-        auth0Sub: 'auth0|newadmin',
+        id: newAdminId,
+        userProfileId: newAdminId,
         email: 'newadmin@motovaultpro.com',
-        role: 'admin',
+        role: 'admin' as const,
         createdAt: new Date(),
-        createdBy: 'auth0|existing',
+        createdBy: creatorId,
         revokedAt: null,
         updatedAt: new Date(),
       };
@@ -74,16 +88,16 @@ describe('AdminService', () => {
       const result = await adminService.createAdmin(
         'newadmin@motovaultpro.com',
         'admin',
-        'auth0|newadmin',
-        'auth0|existing'
+        newAdminId,
+        creatorId
       );
 
       expect(result).toEqual(mockAdmin);
       expect(mockRepository.createAdmin).toHaveBeenCalled();
       expect(mockRepository.logAuditAction).toHaveBeenCalledWith(
-        'auth0|existing',
+        creatorId,
         'CREATE',
-        mockAdmin.auth0Sub,
+        mockAdmin.id,
         'admin_user',
         mockAdmin.email,
         expect.any(Object)
@@ -91,12 +105,14 @@ describe('AdminService', () => {
     });
 
     it('should reject if admin already exists', async () => {
+      const existingId = '7c9e6679-7425-40de-944b-e07fc1f90ae7';
       const existingAdmin = {
-        auth0Sub: 'auth0|existing',
+        id: existingId,
+        userProfileId: existingId,
         email: 'admin@motovaultpro.com',
-        role: 'admin',
+        role: 'admin' as const,
         createdAt: new Date(),
-        createdBy: 'system',
+        createdBy: '550e8400-e29b-41d4-a716-446655440000',
         revokedAt: null,
         updatedAt: new Date(),
       };
@@ -104,39 +120,46 @@ describe('AdminService', () => {
       mockRepository.getAdminByEmail.mockResolvedValue(existingAdmin);
 
       await expect(
-        adminService.createAdmin('admin@motovaultpro.com', 'admin', 'auth0|new', 'auth0|existing')
+        adminService.createAdmin('admin@motovaultpro.com', 'admin', '8f14e45f-ceea-367f-a27f-c9a6d0c67e0e', existingId)
       ).rejects.toThrow('already exists');
     });
   });
 
   describe('revokeAdmin', () => {
     it('should revoke admin when multiple active admins exist', async () => {
+      const toRevokeId = 'a1b2c3d4-e5f6-7890-1234-567890abcdef';
+      const admin1Id = '6ba7b810-9dad-11d1-80b4-00c04fd430c8';
+      const admin2Id = '8f14e45f-ceea-367f-a27f-c9a6d0c67e0e';
+
       const revokedAdmin = {
-        auth0Sub: 'auth0|toadmin',
+        id: toRevokeId,
+        userProfileId: toRevokeId,
         email: 'toadmin@motovaultpro.com',
-        role: 'admin',
+        role: 'admin' as const,
         createdAt: new Date(),
-        createdBy: 'system',
+        createdBy: '550e8400-e29b-41d4-a716-446655440000',
         revokedAt: new Date(),
         updatedAt: new Date(),
       };
 
       const activeAdmins = [
         {
-          auth0Sub: 'auth0|admin1',
+          id: admin1Id,
+          userProfileId: admin1Id,
           email: 'admin1@motovaultpro.com',
-          role: 'admin',
+          role: 'admin' as const,
           createdAt: new Date(),
-          createdBy: 'system',
+          createdBy: '550e8400-e29b-41d4-a716-446655440000',
           revokedAt: null,
           updatedAt: new Date(),
         },
         {
-          auth0Sub: 'auth0|admin2',
+          id: admin2Id,
+          userProfileId: admin2Id,
           email: 'admin2@motovaultpro.com',
-          role: 'admin',
+          role: 'admin' as const,
           createdAt: new Date(),
-          createdBy: 'system',
+          createdBy: '550e8400-e29b-41d4-a716-446655440000',
           revokedAt: null,
           updatedAt: new Date(),
         },
@@ -146,20 +169,22 @@ describe('AdminService', () => {
       mockRepository.revokeAdmin.mockResolvedValue(revokedAdmin);
       mockRepository.logAuditAction.mockResolvedValue({} as any);
 
-      const result = await adminService.revokeAdmin('auth0|toadmin', 'auth0|admin1');
+      const result = await adminService.revokeAdmin(toRevokeId, admin1Id);
 
       expect(result).toEqual(revokedAdmin);
-      expect(mockRepository.revokeAdmin).toHaveBeenCalledWith('auth0|toadmin');
+      expect(mockRepository.revokeAdmin).toHaveBeenCalledWith(toRevokeId);
       expect(mockRepository.logAuditAction).toHaveBeenCalled();
     });
 
     it('should prevent revoking last active admin', async () => {
+      const lastAdminId = '7c9e6679-7425-40de-944b-e07fc1f90ae7';
       const lastAdmin = {
-        auth0Sub: 'auth0|lastadmin',
+        id: lastAdminId,
+        userProfileId: lastAdminId,
         email: 'last@motovaultpro.com',
-        role: 'admin',
+        role: 'admin' as const,
         createdAt: new Date(),
-        createdBy: 'system',
+        createdBy: '550e8400-e29b-41d4-a716-446655440000',
         revokedAt: null,
         updatedAt: new Date(),
       };
@@ -167,19 +192,22 @@ describe('AdminService', () => {
       mockRepository.getActiveAdmins.mockResolvedValue([lastAdmin]);
 
       await expect(
-        adminService.revokeAdmin('auth0|lastadmin', 'auth0|lastadmin')
+        adminService.revokeAdmin(lastAdminId, lastAdminId)
       ).rejects.toThrow('Cannot revoke the last active admin');
     });
   });
 
   describe('reinstateAdmin', () => {
     it('should reinstate revoked admin and log audit', async () => {
+      const reinstateId = 'b2c3d4e5-f6a7-8901-2345-678901bcdef0';
+      const adminActorId = '7c9e6679-7425-40de-944b-e07fc1f90ae7';
       const reinstatedAdmin = {
-        auth0Sub: 'auth0|reinstate',
+        id: reinstateId,
+        userProfileId: reinstateId,
         email: 'reinstate@motovaultpro.com',
-        role: 'admin',
+        role: 'admin' as const,
         createdAt: new Date(),
-        createdBy: 'system',
+        createdBy: '550e8400-e29b-41d4-a716-446655440000',
         revokedAt: null,
         updatedAt: new Date(),
       };
@@ -187,14 +215,14 @@ describe('AdminService', () => {
       mockRepository.reinstateAdmin.mockResolvedValue(reinstatedAdmin);
       mockRepository.logAuditAction.mockResolvedValue({} as any);
 
-      const result = await adminService.reinstateAdmin('auth0|reinstate', 'auth0|admin');
+      const result = await adminService.reinstateAdmin(reinstateId, adminActorId);
 
       expect(result).toEqual(reinstatedAdmin);
-      expect(mockRepository.reinstateAdmin).toHaveBeenCalledWith('auth0|reinstate');
+      expect(mockRepository.reinstateAdmin).toHaveBeenCalledWith(reinstateId);
       expect(mockRepository.logAuditAction).toHaveBeenCalledWith(
-        'auth0|admin',
+        adminActorId,
         'REINSTATE',
-        'auth0|reinstate',
+        reinstateId,
         'admin_user',
         reinstatedAdmin.email
       );

backend/src/features/audit-log/__tests__/audit-log.integration.test.ts

@@ -32,7 +32,7 @@ describe('AuditLog Feature Integration', () => {
 
   describe('Vehicle logging integration', () => {
     it('should create audit log with vehicle category and correct resource', async () => {
-      const userId = 'test-user-vehicle-123';
+      const userId = '550e8400-e29b-41d4-a716-446655440000';
       const vehicleId = 'vehicle-uuid-123';
       const entry = await service.info(
         'vehicle',
@@ -56,7 +56,7 @@ describe('AuditLog Feature Integration', () => {
     });
 
     it('should log vehicle update with correct fields', async () => {
-      const userId = 'test-user-vehicle-456';
+      const userId = '6ba7b810-9dad-11d1-80b4-00c04fd430c8';
       const vehicleId = 'vehicle-uuid-456';
       const entry = await service.info(
         'vehicle',
@@ -75,7 +75,7 @@ describe('AuditLog Feature Integration', () => {
     });
 
     it('should log vehicle deletion with vehicle info', async () => {
-      const userId = 'test-user-vehicle-789';
+      const userId = '7c9e6679-7425-40de-944b-e07fc1f90ae7';
       const vehicleId = 'vehicle-uuid-789';
       const entry = await service.info(
         'vehicle',
@@ -96,7 +96,7 @@ describe('AuditLog Feature Integration', () => {
 
   describe('Auth logging integration', () => {
     it('should create audit log with auth category for signup', async () => {
-      const userId = 'test-user-auth-123';
+      const userId = '550e8400-e29b-41d4-a716-446655440000';
       const entry = await service.info(
         'auth',
         userId,
@@ -116,7 +116,7 @@ describe('AuditLog Feature Integration', () => {
     });
 
     it('should create audit log for password reset request', async () => {
-      const userId = 'test-user-auth-456';
+      const userId = '6ba7b810-9dad-11d1-80b4-00c04fd430c8';
       const entry = await service.info(
         'auth',
         userId,
@@ -134,14 +134,14 @@ describe('AuditLog Feature Integration', () => {
 
   describe('Admin logging integration', () => {
     it('should create audit log for admin user creation', async () => {
-      const adminId = 'admin-user-123';
-      const targetAdminSub = 'auth0|target-admin-456';
+      const adminId = '7c9e6679-7425-40de-944b-e07fc1f90ae7';
+      const targetAdminId = '8f14e45f-ceea-367f-a27f-c9a6d0c67e0e';
       const entry = await service.info(
         'admin',
         adminId,
         'Admin user created: newadmin@example.com',
         'admin_user',
-        targetAdminSub,
+        targetAdminId,
         { email: 'newadmin@example.com', role: 'admin' }
       );
 
@@ -156,14 +156,14 @@ describe('AuditLog Feature Integration', () => {
     });
 
     it('should create audit log for admin revocation', async () => {
-      const adminId = 'admin-user-123';
-      const targetAdminSub = 'auth0|target-admin-789';
+      const adminId = '7c9e6679-7425-40de-944b-e07fc1f90ae7';
+      const targetAdminId = 'a1b2c3d4-e5f6-7890-1234-567890abcdef';
       const entry = await service.info(
         'admin',
         adminId,
         'Admin user revoked: revoked@example.com',
         'admin_user',
-        targetAdminSub,
+        targetAdminId,
         { email: 'revoked@example.com' }
       );
 
@@ -174,14 +174,14 @@ describe('AuditLog Feature Integration', () => {
     });
 
     it('should create audit log for admin reinstatement', async () => {
-      const adminId = 'admin-user-123';
-      const targetAdminSub = 'auth0|target-admin-reinstated';
+      const adminId = '7c9e6679-7425-40de-944b-e07fc1f90ae7';
+      const targetAdminId = 'b2c3d4e5-f6a7-8901-2345-678901bcdef0';
       const entry = await service.info(
         'admin',
         adminId,
         'Admin user reinstated: reinstated@example.com',
         'admin_user',
-        targetAdminSub,
+        targetAdminId,
         { email: 'reinstated@example.com' }
       );
 
@@ -194,7 +194,7 @@ describe('AuditLog Feature Integration', () => {
 
   describe('Backup/System logging integration', () => {
     it('should create audit log for backup creation', async () => {
-      const adminId = 'admin-user-backup-123';
+      const adminId = '7c9e6679-7425-40de-944b-e07fc1f90ae7';
       const backupId = 'backup-uuid-123';
       const entry = await service.info(
         'system',
@@ -215,7 +215,7 @@ describe('AuditLog Feature Integration', () => {
     });
 
     it('should create audit log for backup restore', async () => {
-      const adminId = 'admin-user-backup-456';
+      const adminId = '7c9e6679-7425-40de-944b-e07fc1f90ae7';
       const backupId = 'backup-uuid-456';
       const entry = await service.info(
         'system',
@@ -233,7 +233,7 @@ describe('AuditLog Feature Integration', () => {
     });
 
     it('should create error-level audit log for backup failure', async () => {
-      const adminId = 'admin-user-backup-789';
+      const adminId = '7c9e6679-7425-40de-944b-e07fc1f90ae7';
       const backupId = 'backup-uuid-789';
       const entry = await service.error(
         'system',
@@ -253,7 +253,7 @@ describe('AuditLog Feature Integration', () => {
     });
 
     it('should create error-level audit log for restore failure', async () => {
-      const adminId = 'admin-user-restore-fail';
+      const adminId = '7c9e6679-7425-40de-944b-e07fc1f90ae7';
       const backupId = 'backup-uuid-restore-fail';
       const entry = await service.error(
         'system',

backend/src/features/audit-log/data/audit-log.repository.ts

@@ -126,7 +126,7 @@ export class AuditLogRepository {
              al.resource_type, al.resource_id, al.details, al.created_at,
              up.email as user_email
       FROM audit_logs al
-      LEFT JOIN user_profiles up ON al.user_id = up.auth0_sub
+      LEFT JOIN user_profiles up ON al.user_id = up.id
       ${whereClause}
       ORDER BY al.created_at DESC
       LIMIT $${nextParamIndex} OFFSET $${nextParamIndex + 1}
@@ -170,7 +170,7 @@ export class AuditLogRepository {
              al.resource_type, al.resource_id, al.details, al.created_at,
              up.email as user_email
       FROM audit_logs al
-      LEFT JOIN user_profiles up ON al.user_id = up.auth0_sub
+      LEFT JOIN user_profiles up ON al.user_id = up.id
       ${whereClause}
       ORDER BY al.created_at DESC
       LIMIT ${MAX_EXPORT_RECORDS}

backend/src/features/auth/tests/integration/auth.integration.test.ts

@@ -19,6 +19,7 @@ jest.mock('../../../../core/plugins/auth.plugin', () => {
   return {
     default: fastifyPlugin(async function (fastify) {
       fastify.decorate('authenticate', async function (request, _reply) {
+        // JWT sub is still auth0|xxx format
         request.user = { sub: 'auth0|test-user-123' };
       });
     }, { name: 'auth-plugin' }),

backend/src/features/auth/tests/unit/auth.service.test.ts

@@ -103,6 +103,8 @@ describe('AuthService', () => {
         onboardingCompletedAt: null,
         deactivatedAt: null,
         deactivatedBy: null,
+        deletionRequestedAt: null,
+        deletionScheduledFor: null,
         createdAt: new Date(),
         updatedAt: new Date(),
       });
@@ -116,6 +118,8 @@ describe('AuthService', () => {
         onboardingCompletedAt: null,
         deactivatedAt: null,
         deactivatedBy: null,
+        deletionRequestedAt: null,
+        deletionScheduledFor: null,
         createdAt: new Date(),
         updatedAt: new Date(),
       });
@@ -149,6 +153,8 @@ describe('AuthService', () => {
         onboardingCompletedAt: null,
         deactivatedAt: null,
         deactivatedBy: null,
+        deletionRequestedAt: null,
+        deletionScheduledFor: null,
         createdAt: new Date(),
         updatedAt: new Date(),
       });

backend/src/features/backup/api/backup.controller.ts

@@ -45,12 +45,12 @@ export class BackupController {
     request: FastifyRequest<{ Body: CreateBackupBody }>,
     reply: FastifyReply
   ): Promise<void> {
-    const adminSub = (request as any).userContext?.auth0Sub;
+    const adminUserId = request.userContext?.userId;
 
     const result = await this.backupService.createBackup({
       name: request.body.name,
       backupType: 'manual',
-      createdBy: adminSub,
+      createdBy: adminUserId,
       includeDocuments: request.body.includeDocuments,
     });
 
@@ -58,7 +58,7 @@ export class BackupController {
       // Log backup creation to unified audit log
       await auditLogService.info(
         'system',
-        adminSub || null,
+        adminUserId || null,
         `Backup created: ${request.body.name || 'Manual backup'}`,
         'backup',
         result.backupId,
@@ -74,7 +74,7 @@ export class BackupController {
       // Log backup failure
       await auditLogService.error(
         'system',
-        adminSub || null,
+        adminUserId || null,
         `Backup failed: ${request.body.name || 'Manual backup'}`,
         'backup',
         result.backupId,
@@ -139,7 +139,7 @@ export class BackupController {
     request: FastifyRequest,
     reply: FastifyReply
   ): Promise<void> {
-    const adminSub = (request as any).userContext?.auth0Sub;
+    const adminUserId = request.userContext?.userId;
 
     // Handle multipart file upload
     const data = await request.file();
@@ -173,7 +173,7 @@ export class BackupController {
       const backup = await this.backupService.importUploadedBackup(
         tempPath,
         filename,
-        adminSub
+        adminUserId
       );
 
       reply.status(201).send({
@@ -217,7 +217,7 @@ export class BackupController {
     request: FastifyRequest<{ Params: BackupIdParam; Body: RestoreBody }>,
     reply: FastifyReply
   ): Promise<void> {
-    const adminSub = (request as any).userContext?.auth0Sub;
+    const adminUserId = request.userContext?.userId;
 
     try {
       const result = await this.restoreService.executeRestore({
@@ -229,7 +229,7 @@ export class BackupController {
         // Log successful restore to unified audit log
         await auditLogService.info(
           'system',
-          adminSub || null,
+          adminUserId || null,
           `Backup restored: ${request.params.id}`,
           'backup',
           request.params.id,
@@ -246,7 +246,7 @@ export class BackupController {
         // Log restore failure
         await auditLogService.error(
           'system',
-          adminSub || null,
+          adminUserId || null,
           `Backup restore failed: ${request.params.id}`,
           'backup',
           request.params.id,

backend/src/features/fuel-logs/tests/fixtures/fuel-logs.fixtures.json

@@ -73,7 +73,7 @@
   },
   "responseWithEfficiency": {
     "id": "f47ac10b-58cc-4372-a567-0e02b2c3d479",
-    "userId": "auth0|user123",
+    "userId": "550e8400-e29b-41d4-a716-446655440000",
     "vehicleId": "550e8400-e29b-41d4-a716-446655440000",
     "dateTime": "2024-01-15T10:30:00Z",
     "odometerReading": 52000,

backend/src/features/maintenance/tests/fixtures/maintenance.fixtures.json

@@ -99,7 +99,7 @@
   },
   "maintenanceScheduleResponse": {
     "id": "f47ac10b-58cc-4372-a567-0e02b2c3d479",
-    "userId": "auth0|user123",
+    "userId": "550e8400-e29b-41d4-a716-446655440000",
     "vehicleId": "550e8400-e29b-41d4-a716-446655440000",
     "type": "oil_change",
     "category": "routine_maintenance",

backend/src/features/ocr/api/ocr.controller.ts

@@ -33,7 +33,7 @@ export class OcrController {
     request: FastifyRequest<{ Querystring: ExtractQuery }>,
     reply: FastifyReply
   ) {
-    const userId = (request as any).user?.sub as string;
+    const userId = request.userContext?.userId as string;
     const preprocess = request.query.preprocess !== false;
 
     logger.info('OCR extract requested', {
@@ -140,7 +140,7 @@ export class OcrController {
     request: FastifyRequest,
     reply: FastifyReply
   ) {
-    const userId = (request as any).user?.sub as string;
+    const userId = request.userContext?.userId as string;
 
     logger.info('VIN extract requested', {
       operation: 'ocr.controller.extractVin',
@@ -240,7 +240,7 @@ export class OcrController {
     request: FastifyRequest,
     reply: FastifyReply
   ) {
-    const userId = (request as any).user?.sub as string;
+    const userId = request.userContext?.userId as string;
 
     logger.info('Receipt extract requested', {
       operation: 'ocr.controller.extractReceipt',
@@ -352,7 +352,7 @@ export class OcrController {
     request: FastifyRequest,
     reply: FastifyReply
   ) {
-    const userId = (request as any).user?.sub as string;
+    const userId = request.userContext?.userId as string;
 
     logger.info('Maintenance receipt extract requested', {
       operation: 'ocr.controller.extractMaintenanceReceipt',
@@ -460,7 +460,7 @@ export class OcrController {
     request: FastifyRequest,
     reply: FastifyReply
   ) {
-    const userId = (request as any).user?.sub as string;
+    const userId = request.userContext?.userId as string;
 
     logger.info('Manual extract requested', {
       operation: 'ocr.controller.extractManual',
@@ -584,7 +584,7 @@ export class OcrController {
     request: FastifyRequest<{ Body: JobSubmitBody }>,
     reply: FastifyReply
   ) {
-    const userId = (request as any).user?.sub as string;
+    const userId = request.userContext?.userId as string;
 
     logger.info('OCR job submit requested', {
       operation: 'ocr.controller.submitJob',
@@ -691,7 +691,7 @@ export class OcrController {
     request: FastifyRequest<{ Params: JobIdParams }>,
     reply: FastifyReply
   ) {
-    const userId = (request as any).user?.sub as string;
+    const userId = request.userContext?.userId as string;
     const { jobId } = request.params;
 
     logger.debug('OCR job status requested', {

backend/src/features/stations/tests/integration/community-stations.api.test.ts

@@ -12,8 +12,8 @@ describe('Community Stations API Integration Tests', () => {
   let app: FastifyInstance;
   let pool: Pool;
 
-  const testUserId = 'auth0|test-user-123';
-  const testAdminId = 'auth0|test-admin-123';
+  const testUserId = '550e8400-e29b-41d4-a716-446655440000';
+  const testAdminId = '7c9e6679-7425-40de-944b-e07fc1f90ae7';
 
   const mockStationData = {
     name: 'Test Gas Station',

backend/src/features/user-profile/api/user-profile.controller.ts

@@ -18,11 +18,12 @@ import {
 
 export class UserProfileController {
   private userProfileService: UserProfileService;
+  private userProfileRepository: UserProfileRepository;
 
   constructor() {
-    const repository = new UserProfileRepository(pool);
+    this.userProfileRepository = new UserProfileRepository(pool);
     const adminRepository = new AdminRepository(pool);
-    this.userProfileService = new UserProfileService(repository);
+    this.userProfileService = new UserProfileService(this.userProfileRepository);
     this.userProfileService.setAdminRepository(adminRepository);
   }
 
@@ -31,27 +32,24 @@ export class UserProfileController {
    */
   async getProfile(request: FastifyRequest, reply: FastifyReply) {
     try {
-      const auth0Sub = request.userContext?.userId;
+      const userId = request.userContext?.userId;
 
-      if (!auth0Sub) {
+      if (!userId) {
         return reply.code(401).send({
           error: 'Unauthorized',
           message: 'User context missing',
         });
       }
 
-      // Get user data from Auth0 token
-      const auth0User = {
-        sub: auth0Sub,
-        email: (request as any).user?.email || request.userContext?.email || '',
-        name: (request as any).user?.name,
-      };
+      // Get profile by UUID (auth plugin ensures profile exists during authentication)
+      const profile = await this.userProfileRepository.getById(userId);
 
-      // Get or create profile
-      const profile = await this.userProfileService.getOrCreateProfile(
-        auth0Sub,
-        auth0User
-      );
+      if (!profile) {
+        return reply.code(404).send({
+          error: 'Not Found',
+          message: 'User profile not found',
+        });
+      }
 
       return reply.code(200).send(profile);
     } catch (error: any) {
@@ -75,9 +73,9 @@ export class UserProfileController {
     reply: FastifyReply
   ) {
     try {
-      const auth0Sub = request.userContext?.userId;
+      const userId = request.userContext?.userId;
 
-      if (!auth0Sub) {
+      if (!userId) {
         return reply.code(401).send({
           error: 'Unauthorized',
           message: 'User context missing',
@@ -96,9 +94,9 @@ export class UserProfileController {
 
       const updates = validation.data;
 
-      // Update profile
+      // Update profile by UUID
       const profile = await this.userProfileService.updateProfile(
-        auth0Sub,
+        userId,
         updates
       );
 
@@ -138,9 +136,9 @@ export class UserProfileController {
     reply: FastifyReply
   ) {
     try {
-      const auth0Sub = request.userContext?.userId;
+      const userId = request.userContext?.userId;
 
-      if (!auth0Sub) {
+      if (!userId) {
         return reply.code(401).send({
           error: 'Unauthorized',
           message: 'User context missing',
@@ -159,9 +157,9 @@ export class UserProfileController {
 
       const { confirmationText } = validation.data;
 
-      // Request deletion (user is already authenticated via JWT)
+      // Request deletion by UUID
       const profile = await this.userProfileService.requestDeletion(
-        auth0Sub,
+        userId,
         confirmationText
       );
 
@@ -210,17 +208,17 @@ export class UserProfileController {
    */
   async cancelDeletion(request: FastifyRequest, reply: FastifyReply) {
     try {
-      const auth0Sub = request.userContext?.userId;
+      const userId = request.userContext?.userId;
 
-      if (!auth0Sub) {
+      if (!userId) {
         return reply.code(401).send({
           error: 'Unauthorized',
           message: 'User context missing',
         });
       }
 
-      // Cancel deletion
-      const profile = await this.userProfileService.cancelDeletion(auth0Sub);
+      // Cancel deletion by UUID
+      const profile = await this.userProfileService.cancelDeletion(userId);
 
       return reply.code(200).send({
         message: 'Account deletion canceled successfully',
@@ -258,27 +256,24 @@ export class UserProfileController {
    */
   async getDeletionStatus(request: FastifyRequest, reply: FastifyReply) {
     try {
-      const auth0Sub = request.userContext?.userId;
+      const userId = request.userContext?.userId;
 
-      if (!auth0Sub) {
+      if (!userId) {
         return reply.code(401).send({
           error: 'Unauthorized',
           message: 'User context missing',
         });
       }
 
-      // Get user data from Auth0 token
-      const auth0User = {
-        sub: auth0Sub,
-        email: (request as any).user?.email || request.userContext?.email || '',
-        name: (request as any).user?.name,
-      };
+      // Get profile by UUID (auth plugin ensures profile exists)
+      const profile = await this.userProfileRepository.getById(userId);
 
-      // Get or create profile
-      const profile = await this.userProfileService.getOrCreateProfile(
-        auth0Sub,
-        auth0User
-      );
+      if (!profile) {
+        return reply.code(404).send({
+          error: 'Not Found',
+          message: 'User profile not found',
+        });
+      }
 
       const deletionStatus = this.userProfileService.getDeletionStatus(profile);
 

backend/src/features/user-profile/data/user-profile.repository.ts

@@ -44,6 +44,26 @@ export class UserProfileRepository {
     }
   }
 
+  async getById(id: string): Promise<UserProfile | null> {
+    const query = `
+      SELECT ${USER_PROFILE_COLUMNS}
+      FROM user_profiles
+      WHERE id = $1
+      LIMIT 1
+    `;
+
+    try {
+      const result = await this.pool.query(query, [id]);
+      if (result.rows.length === 0) {
+        return null;
+      }
+      return this.mapRowToUserProfile(result.rows[0]);
+    } catch (error) {
+      logger.error('Error fetching user profile by id', { error, id });
+      throw error;
+    }
+  }
+
   async getByEmail(email: string): Promise<UserProfile | null> {
     const query = `
       SELECT ${USER_PROFILE_COLUMNS}
@@ -94,7 +114,7 @@ export class UserProfileRepository {
   }
 
   async update(
-    auth0Sub: string,
+    userId: string,
     updates: { displayName?: string; notificationEmail?: string }
   ): Promise<UserProfile> {
     const setClauses: string[] = [];
@@ -115,12 +135,12 @@ export class UserProfileRepository {
       throw new Error('No fields to update');
     }
 
-    values.push(auth0Sub);
+    values.push(userId);
 
     const query = `
       UPDATE user_profiles
       SET ${setClauses.join(', ')}
-      WHERE auth0_sub = $${paramIndex}
+      WHERE id = $${paramIndex}
       RETURNING ${USER_PROFILE_COLUMNS}
     `;
 
@@ -133,7 +153,7 @@ export class UserProfileRepository {
 
       return this.mapRowToUserProfile(result.rows[0]);
     } catch (error) {
-      logger.error('Error updating user profile', { error, auth0Sub, updates });
+      logger.error('Error updating user profile', { error, userId, updates });
       throw error;
     }
   }
@@ -174,7 +194,7 @@ export class UserProfileRepository {
   private mapRowToUserWithAdminStatus(row: any): UserWithAdminStatus {
     return {
       ...this.mapRowToUserProfile(row),
-      isAdmin: !!row.admin_auth0_sub,
+      isAdmin: !!row.admin_id,
       adminRole: row.admin_role || null,
       vehicleCount: parseInt(row.vehicle_count, 10) || 0,
     };
@@ -242,14 +262,14 @@ export class UserProfileRepository {
         up.id, up.auth0_sub, up.email, up.display_name, up.notification_email,
         up.subscription_tier, up.email_verified, up.onboarding_completed_at,
         up.deactivated_at, up.deactivated_by, up.created_at, up.updated_at,
-        au.auth0_sub as admin_auth0_sub,
+        au.id as admin_id,
         au.role as admin_role,
         (SELECT COUNT(*) FROM vehicles v
-         WHERE v.user_id = up.auth0_sub
+         WHERE v.user_id = up.id
          AND v.is_active = true
          AND v.deleted_at IS NULL) as vehicle_count
       FROM user_profiles up
-      LEFT JOIN admin_users au ON up.auth0_sub = au.auth0_sub AND au.revoked_at IS NULL
+      LEFT JOIN admin_users au ON au.user_profile_id = up.id AND au.revoked_at IS NULL
       ${whereClause}
       ORDER BY ${sortColumn} ${sortOrder === 'desc' ? 'DESC' : 'ASC'} NULLS LAST
       LIMIT $${paramIndex} OFFSET $${paramIndex + 1}
@@ -274,32 +294,32 @@ export class UserProfileRepository {
   /**
    * Get single user with admin status
    */
-  async getUserWithAdminStatus(auth0Sub: string): Promise<UserWithAdminStatus | null> {
+  async getUserWithAdminStatus(userId: string): Promise<UserWithAdminStatus | null> {
     const query = `
       SELECT
         up.id, up.auth0_sub, up.email, up.display_name, up.notification_email,
         up.subscription_tier, up.email_verified, up.onboarding_completed_at,
         up.deactivated_at, up.deactivated_by, up.created_at, up.updated_at,
-        au.auth0_sub as admin_auth0_sub,
+        au.id as admin_id,
         au.role as admin_role,
         (SELECT COUNT(*) FROM vehicles v
-         WHERE v.user_id = up.auth0_sub
+         WHERE v.user_id = up.id
          AND v.is_active = true
          AND v.deleted_at IS NULL) as vehicle_count
       FROM user_profiles up
-      LEFT JOIN admin_users au ON up.auth0_sub = au.auth0_sub AND au.revoked_at IS NULL
-      WHERE up.auth0_sub = $1
+      LEFT JOIN admin_users au ON au.user_profile_id = up.id AND au.revoked_at IS NULL
+      WHERE up.id = $1
       LIMIT 1
     `;
 
     try {
-      const result = await this.pool.query(query, [auth0Sub]);
+      const result = await this.pool.query(query, [userId]);
       if (result.rows.length === 0) {
         return null;
       }
       return this.mapRowToUserWithAdminStatus(result.rows[0]);
     } catch (error) {
-      logger.error('Error fetching user with admin status', { error, auth0Sub });
+      logger.error('Error fetching user with admin status', { error, userId });
       throw error;
     }
   }
@@ -308,24 +328,24 @@ export class UserProfileRepository {
    * Update user subscription tier
    */
   async updateSubscriptionTier(
-    auth0Sub: string,
+    userId: string,
     tier: SubscriptionTier
   ): Promise<UserProfile> {
     const query = `
       UPDATE user_profiles
       SET subscription_tier = $1
-      WHERE auth0_sub = $2
+      WHERE id = $2
       RETURNING ${USER_PROFILE_COLUMNS}
     `;
 
     try {
-      const result = await this.pool.query(query, [tier, auth0Sub]);
+      const result = await this.pool.query(query, [tier, userId]);
       if (result.rows.length === 0) {
         throw new Error('User profile not found');
       }
       return this.mapRowToUserProfile(result.rows[0]);
     } catch (error) {
-      logger.error('Error updating subscription tier', { error, auth0Sub, tier });
+      logger.error('Error updating subscription tier', { error, userId, tier });
       throw error;
     }
   }
@@ -333,22 +353,22 @@ export class UserProfileRepository {
   /**
    * Deactivate user (soft delete)
    */
-  async deactivateUser(auth0Sub: string, deactivatedBy: string): Promise<UserProfile> {
+  async deactivateUser(userId: string, deactivatedBy: string): Promise<UserProfile> {
     const query = `
       UPDATE user_profiles
       SET deactivated_at = NOW(), deactivated_by = $1
-      WHERE auth0_sub = $2 AND deactivated_at IS NULL
+      WHERE id = $2 AND deactivated_at IS NULL
       RETURNING ${USER_PROFILE_COLUMNS}
     `;
 
     try {
-      const result = await this.pool.query(query, [deactivatedBy, auth0Sub]);
+      const result = await this.pool.query(query, [deactivatedBy, userId]);
       if (result.rows.length === 0) {
         throw new Error('User profile not found or already deactivated');
       }
       return this.mapRowToUserProfile(result.rows[0]);
     } catch (error) {
-      logger.error('Error deactivating user', { error, auth0Sub, deactivatedBy });
+      logger.error('Error deactivating user', { error, userId, deactivatedBy });
       throw error;
     }
   }
@@ -356,22 +376,22 @@ export class UserProfileRepository {
   /**
    * Reactivate user
    */
-  async reactivateUser(auth0Sub: string): Promise<UserProfile> {
+  async reactivateUser(userId: string): Promise<UserProfile> {
     const query = `
       UPDATE user_profiles
       SET deactivated_at = NULL, deactivated_by = NULL
-      WHERE auth0_sub = $1 AND deactivated_at IS NOT NULL
+      WHERE id = $1 AND deactivated_at IS NOT NULL
       RETURNING ${USER_PROFILE_COLUMNS}
     `;
 
     try {
-      const result = await this.pool.query(query, [auth0Sub]);
+      const result = await this.pool.query(query, [userId]);
       if (result.rows.length === 0) {
         throw new Error('User profile not found or not deactivated');
       }
       return this.mapRowToUserProfile(result.rows[0]);
     } catch (error) {
-      logger.error('Error reactivating user', { error, auth0Sub });
+      logger.error('Error reactivating user', { error, userId });
       throw error;
     }
   }
@@ -380,7 +400,7 @@ export class UserProfileRepository {
    * Admin update of user profile (can update email and displayName)
    */
   async adminUpdateProfile(
-    auth0Sub: string,
+    userId: string,
     updates: { email?: string; displayName?: string }
   ): Promise<UserProfile> {
     const setClauses: string[] = [];
@@ -401,12 +421,12 @@ export class UserProfileRepository {
       throw new Error('No fields to update');
     }
 
-    values.push(auth0Sub);
+    values.push(userId);
 
     const query = `
       UPDATE user_profiles
       SET ${setClauses.join(', ')}, updated_at = NOW()
-      WHERE auth0_sub = $${paramIndex}
+      WHERE id = $${paramIndex}
       RETURNING ${USER_PROFILE_COLUMNS}
     `;
 
@@ -419,7 +439,7 @@ export class UserProfileRepository {
 
       return this.mapRowToUserProfile(result.rows[0]);
     } catch (error) {
-      logger.error('Error admin updating user profile', { error, auth0Sub, updates });
+      logger.error('Error admin updating user profile', { error, userId, updates });
       throw error;
     }
   }
@@ -427,22 +447,22 @@ export class UserProfileRepository {
   /**
    * Update email verification status
    */
-  async updateEmailVerified(auth0Sub: string, emailVerified: boolean): Promise<UserProfile> {
+  async updateEmailVerified(userId: string, emailVerified: boolean): Promise<UserProfile> {
     const query = `
       UPDATE user_profiles
       SET email_verified = $1, updated_at = NOW()
-      WHERE auth0_sub = $2
+      WHERE id = $2
       RETURNING ${USER_PROFILE_COLUMNS}
     `;
 
     try {
-      const result = await this.pool.query(query, [emailVerified, auth0Sub]);
+      const result = await this.pool.query(query, [emailVerified, userId]);
       if (result.rows.length === 0) {
         throw new Error('User profile not found');
       }
       return this.mapRowToUserProfile(result.rows[0]);
     } catch (error) {
-      logger.error('Error updating email verified status', { error, auth0Sub, emailVerified });
+      logger.error('Error updating email verified status', { error, userId, emailVerified });
       throw error;
     }
   }
@@ -450,19 +470,19 @@ export class UserProfileRepository {
   /**
    * Mark onboarding as complete
    */
-  async markOnboardingComplete(auth0Sub: string): Promise<UserProfile> {
+  async markOnboardingComplete(userId: string): Promise<UserProfile> {
     const query = `
       UPDATE user_profiles
       SET onboarding_completed_at = NOW(), updated_at = NOW()
-      WHERE auth0_sub = $1 AND onboarding_completed_at IS NULL
+      WHERE id = $1 AND onboarding_completed_at IS NULL
       RETURNING ${USER_PROFILE_COLUMNS}
     `;
 
     try {
-      const result = await this.pool.query(query, [auth0Sub]);
+      const result = await this.pool.query(query, [userId]);
       if (result.rows.length === 0) {
         // Check if already completed or profile not found
-        const existing = await this.getByAuth0Sub(auth0Sub);
+        const existing = await this.getById(userId);
         if (existing && existing.onboardingCompletedAt) {
           return existing; // Already completed, return as-is
         }
@@ -470,7 +490,7 @@ export class UserProfileRepository {
       }
       return this.mapRowToUserProfile(result.rows[0]);
     } catch (error) {
-      logger.error('Error marking onboarding complete', { error, auth0Sub });
+      logger.error('Error marking onboarding complete', { error, userId });
       throw error;
     }
   }
@@ -478,22 +498,22 @@ export class UserProfileRepository {
   /**
    * Update user email (used when fetching correct email from Auth0)
    */
-  async updateEmail(auth0Sub: string, email: string): Promise<UserProfile> {
+  async updateEmail(userId: string, email: string): Promise<UserProfile> {
     const query = `
       UPDATE user_profiles
       SET email = $1, updated_at = NOW()
-      WHERE auth0_sub = $2
+      WHERE id = $2
       RETURNING ${USER_PROFILE_COLUMNS}
     `;
 
     try {
-      const result = await this.pool.query(query, [email, auth0Sub]);
+      const result = await this.pool.query(query, [email, userId]);
       if (result.rows.length === 0) {
         throw new Error('User profile not found');
       }
       return this.mapRowToUserProfile(result.rows[0]);
     } catch (error) {
-      logger.error('Error updating user email', { error, auth0Sub });
+      logger.error('Error updating user email', { error, userId });
       throw error;
     }
   }
@@ -502,7 +522,7 @@ export class UserProfileRepository {
    * Request account deletion (sets deletion timestamps and deactivates account)
    * 30-day grace period before permanent deletion
    */
-  async requestDeletion(auth0Sub: string): Promise<UserProfile> {
+  async requestDeletion(userId: string): Promise<UserProfile> {
     const query = `
       UPDATE user_profiles
       SET
@@ -510,18 +530,18 @@ export class UserProfileRepository {
         deletion_scheduled_for = NOW() + INTERVAL '30 days',
         deactivated_at = NOW(),
         updated_at = NOW()
-      WHERE auth0_sub = $1 AND deletion_requested_at IS NULL
+      WHERE id = $1 AND deletion_requested_at IS NULL
       RETURNING ${USER_PROFILE_COLUMNS}
     `;
 
     try {
-      const result = await this.pool.query(query, [auth0Sub]);
+      const result = await this.pool.query(query, [userId]);
       if (result.rows.length === 0) {
         throw new Error('User profile not found or deletion already requested');
       }
       return this.mapRowToUserProfile(result.rows[0]);
     } catch (error) {
-      logger.error('Error requesting account deletion', { error, auth0Sub });
+      logger.error('Error requesting account deletion', { error, userId });
       throw error;
     }
   }
@@ -529,7 +549,7 @@ export class UserProfileRepository {
   /**
    * Cancel deletion request (clears deletion timestamps and reactivates account)
    */
-  async cancelDeletion(auth0Sub: string): Promise<UserProfile> {
+  async cancelDeletion(userId: string): Promise<UserProfile> {
     const query = `
       UPDATE user_profiles
       SET
@@ -538,18 +558,18 @@ export class UserProfileRepository {
         deactivated_at = NULL,
         deactivated_by = NULL,
         updated_at = NOW()
-      WHERE auth0_sub = $1 AND deletion_requested_at IS NOT NULL
+      WHERE id = $1 AND deletion_requested_at IS NOT NULL
       RETURNING ${USER_PROFILE_COLUMNS}
     `;
 
     try {
-      const result = await this.pool.query(query, [auth0Sub]);
+      const result = await this.pool.query(query, [userId]);
       if (result.rows.length === 0) {
         throw new Error('User profile not found or no deletion request pending');
       }
       return this.mapRowToUserProfile(result.rows[0]);
     } catch (error) {
-      logger.error('Error canceling account deletion', { error, auth0Sub });
+      logger.error('Error canceling account deletion', { error, userId });
       throw error;
     }
   }
@@ -579,7 +599,7 @@ export class UserProfileRepository {
    * Hard delete user and all associated data
    * This is a permanent operation - use with caution
    */
-  async hardDeleteUser(auth0Sub: string): Promise<void> {
+  async hardDeleteUser(userId: string): Promise<void> {
     const client = await this.pool.connect();
 
     try {
@@ -590,51 +610,51 @@ export class UserProfileRepository {
         `UPDATE community_stations
          SET submitted_by = 'deleted-user'
          WHERE submitted_by = $1`,
-        [auth0Sub]
+        [userId]
       );
 
       // 2. Delete notification logs
       await client.query(
         'DELETE FROM notification_logs WHERE user_id = $1',
-        [auth0Sub]
+        [userId]
       );
 
       // 3. Delete user notifications
       await client.query(
         'DELETE FROM user_notifications WHERE user_id = $1',
-        [auth0Sub]
+        [userId]
       );
 
       // 4. Delete saved stations
       await client.query(
         'DELETE FROM saved_stations WHERE user_id = $1',
-        [auth0Sub]
+        [userId]
       );
 
       // 5. Delete vehicles (cascades to fuel_logs, maintenance_logs, maintenance_schedules, documents)
       await client.query(
         'DELETE FROM vehicles WHERE user_id = $1',
-        [auth0Sub]
+        [userId]
       );
 
       // 6. Delete user preferences
       await client.query(
         'DELETE FROM user_preferences WHERE user_id = $1',
-        [auth0Sub]
+        [userId]
       );
 
       // 7. Delete user profile (final step)
       await client.query(
-        'DELETE FROM user_profiles WHERE auth0_sub = $1',
-        [auth0Sub]
+        'DELETE FROM user_profiles WHERE id = $1',
+        [userId]
       );
 
       await client.query('COMMIT');
 
-      logger.info('User hard deleted successfully', { auth0Sub });
+      logger.info('User hard deleted successfully', { userId });
     } catch (error) {
       await client.query('ROLLBACK');
-      logger.error('Error hard deleting user', { error, auth0Sub });
+      logger.error('Error hard deleting user', { error, userId });
       throw error;
     } finally {
       client.release();
@@ -686,7 +706,7 @@ export class UserProfileRepository {
    * Get vehicles for a user (admin view)
    * Returns only year, make, model for privacy
    */
-  async getUserVehiclesForAdmin(auth0Sub: string): Promise<Array<{ year: number; make: string; model: string }>> {
+  async getUserVehiclesForAdmin(userId: string): Promise<Array<{ year: number; make: string; model: string }>> {
     const query = `
       SELECT year, make, model
       FROM vehicles
@@ -697,14 +717,14 @@ export class UserProfileRepository {
     `;
 
     try {
-      const result = await this.pool.query(query, [auth0Sub]);
+      const result = await this.pool.query(query, [userId]);
       return result.rows.map(row => ({
         year: row.year,
         make: row.make,
         model: row.model,
       }));
     } catch (error) {
-      logger.error('Error getting user vehicles for admin', { error, auth0Sub });
+      logger.error('Error getting user vehicles for admin', { error, userId });
       throw error;
     }
   }

backend/src/features/user-profile/domain/user-profile.service.ts

@@ -60,7 +60,7 @@ export class UserProfileService {
   }
 
   /**
-   * Get user profile by Auth0 sub
+   * Get user profile by Auth0 sub (used during auth flow)
    */
   async getProfile(auth0Sub: string): Promise<UserProfile | null> {
     try {
@@ -72,10 +72,10 @@ export class UserProfileService {
   }
 
   /**
-   * Update user profile
+   * Update user profile by UUID
    */
   async updateProfile(
-    auth0Sub: string,
+    userId: string,
     updates: UpdateProfileRequest
   ): Promise<UserProfile> {
     try {
@@ -85,17 +85,17 @@ export class UserProfileService {
       }
 
       // Perform the update
-      const profile = await this.repository.update(auth0Sub, updates);
+      const profile = await this.repository.update(userId, updates);
 
       logger.info('User profile updated', {
-        auth0Sub,
+        userId,
         profileId: profile.id,
         updatedFields: Object.keys(updates),
       });
 
       return profile;
     } catch (error) {
-      logger.error('Error updating user profile', { error, auth0Sub, updates });
+      logger.error('Error updating user profile', { error, userId, updates });
       throw error;
     }
   }
@@ -117,29 +117,29 @@ export class UserProfileService {
   }
 
   /**
-   * Get user details with admin status (admin-only)
+   * Get user details with admin status by UUID (admin-only)
    */
-  async getUserDetails(auth0Sub: string): Promise<UserWithAdminStatus | null> {
+  async getUserDetails(userId: string): Promise<UserWithAdminStatus | null> {
     try {
-      return await this.repository.getUserWithAdminStatus(auth0Sub);
+      return await this.repository.getUserWithAdminStatus(userId);
     } catch (error) {
-      logger.error('Error getting user details', { error, auth0Sub });
+      logger.error('Error getting user details', { error, userId });
       throw error;
     }
   }
 
   /**
-   * Update user subscription tier (admin-only)
+   * Update user subscription tier by UUID (admin-only)
    * Logs the change to admin audit logs
    */
   async updateSubscriptionTier(
-    auth0Sub: string,
+    userId: string,
     tier: SubscriptionTier,
-    actorAuth0Sub: string
+    actorUserId: string
   ): Promise<UserProfile> {
     try {
       // Get current user to log the change
-      const currentUser = await this.repository.getByAuth0Sub(auth0Sub);
+      const currentUser = await this.repository.getById(userId);
       if (!currentUser) {
         throw new Error('User not found');
       }
@@ -147,14 +147,14 @@ export class UserProfileService {
       const previousTier = currentUser.subscriptionTier;
 
       // Perform the update
-      const updatedProfile = await this.repository.updateSubscriptionTier(auth0Sub, tier);
+      const updatedProfile = await this.repository.updateSubscriptionTier(userId, tier);
 
       // Log to audit trail
       if (this.adminRepository) {
         await this.adminRepository.logAuditAction(
-          actorAuth0Sub,
+          actorUserId,
           'UPDATE_TIER',
-          auth0Sub,
+          userId,
           'user_profile',
           updatedProfile.id,
           { previousTier, newTier: tier }
@@ -162,36 +162,36 @@ export class UserProfileService {
       }
 
       logger.info('User subscription tier updated', {
-        auth0Sub,
+        userId,
         previousTier,
         newTier: tier,
-        actorAuth0Sub,
+        actorUserId,
       });
 
       return updatedProfile;
     } catch (error) {
-      logger.error('Error updating subscription tier', { error, auth0Sub, tier, actorAuth0Sub });
+      logger.error('Error updating subscription tier', { error, userId, tier, actorUserId });
       throw error;
     }
   }
 
   /**
-   * Deactivate user account (admin-only soft delete)
+   * Deactivate user account by UUID (admin-only soft delete)
    * Prevents self-deactivation
    */
   async deactivateUser(
-    auth0Sub: string,
-    actorAuth0Sub: string,
+    userId: string,
+    actorUserId: string,
     reason?: string
   ): Promise<UserProfile> {
     try {
       // Prevent self-deactivation
-      if (auth0Sub === actorAuth0Sub) {
+      if (userId === actorUserId) {
         throw new Error('Cannot deactivate your own account');
       }
 
       // Verify user exists and is not already deactivated
-      const currentUser = await this.repository.getByAuth0Sub(auth0Sub);
+      const currentUser = await this.repository.getById(userId);
       if (!currentUser) {
         throw new Error('User not found');
       }
@@ -200,14 +200,14 @@ export class UserProfileService {
       }
 
       // Perform the deactivation
-      const deactivatedProfile = await this.repository.deactivateUser(auth0Sub, actorAuth0Sub);
+      const deactivatedProfile = await this.repository.deactivateUser(userId, actorUserId);
 
       // Log to audit trail
       if (this.adminRepository) {
         await this.adminRepository.logAuditAction(
-          actorAuth0Sub,
+          actorUserId,
           'DEACTIVATE_USER',
-          auth0Sub,
+          userId,
           'user_profile',
           deactivatedProfile.id,
           { reason: reason || 'No reason provided' }
@@ -215,28 +215,28 @@ export class UserProfileService {
       }
 
       logger.info('User deactivated', {
-        auth0Sub,
-        actorAuth0Sub,
+        userId,
+        actorUserId,
         reason,
       });
 
       return deactivatedProfile;
     } catch (error) {
-      logger.error('Error deactivating user', { error, auth0Sub, actorAuth0Sub });
+      logger.error('Error deactivating user', { error, userId, actorUserId });
       throw error;
     }
   }
 
   /**
-   * Reactivate a deactivated user account (admin-only)
+   * Reactivate a deactivated user account by UUID (admin-only)
    */
   async reactivateUser(
-    auth0Sub: string,
-    actorAuth0Sub: string
+    userId: string,
+    actorUserId: string
   ): Promise<UserProfile> {
     try {
       // Verify user exists and is deactivated
-      const currentUser = await this.repository.getByAuth0Sub(auth0Sub);
+      const currentUser = await this.repository.getById(userId);
       if (!currentUser) {
         throw new Error('User not found');
       }
@@ -245,14 +245,14 @@ export class UserProfileService {
       }
 
       // Perform the reactivation
-      const reactivatedProfile = await this.repository.reactivateUser(auth0Sub);
+      const reactivatedProfile = await this.repository.reactivateUser(userId);
 
       // Log to audit trail
       if (this.adminRepository) {
         await this.adminRepository.logAuditAction(
-          actorAuth0Sub,
+          actorUserId,
           'REACTIVATE_USER',
-          auth0Sub,
+          userId,
           'user_profile',
           reactivatedProfile.id,
           { previouslyDeactivatedBy: currentUser.deactivatedBy }
@@ -260,29 +260,29 @@ export class UserProfileService {
       }
 
       logger.info('User reactivated', {
-        auth0Sub,
-        actorAuth0Sub,
+        userId,
+        actorUserId,
       });
 
       return reactivatedProfile;
     } catch (error) {
-      logger.error('Error reactivating user', { error, auth0Sub, actorAuth0Sub });
+      logger.error('Error reactivating user', { error, userId, actorUserId });
       throw error;
     }
   }
 
   /**
-   * Admin update of user profile (email, displayName)
+   * Admin update of user profile by UUID (email, displayName)
    * Logs the change to admin audit logs
    */
   async adminUpdateProfile(
-    auth0Sub: string,
+    userId: string,
     updates: { email?: string; displayName?: string },
-    actorAuth0Sub: string
+    actorUserId: string
   ): Promise<UserProfile> {
     try {
       // Get current user to log the change
-      const currentUser = await this.repository.getByAuth0Sub(auth0Sub);
+      const currentUser = await this.repository.getById(userId);
       if (!currentUser) {
         throw new Error('User not found');
       }
@@ -293,14 +293,14 @@ export class UserProfileService {
       };
 
       // Perform the update
-      const updatedProfile = await this.repository.adminUpdateProfile(auth0Sub, updates);
+      const updatedProfile = await this.repository.adminUpdateProfile(userId, updates);
 
       // Log to audit trail
       if (this.adminRepository) {
         await this.adminRepository.logAuditAction(
-          actorAuth0Sub,
+          actorUserId,
           'UPDATE_PROFILE',
-          auth0Sub,
+          userId,
           'user_profile',
           updatedProfile.id,
           {
@@ -311,14 +311,14 @@ export class UserProfileService {
       }
 
       logger.info('User profile updated by admin', {
-        auth0Sub,
+        userId,
         updatedFields: Object.keys(updates),
-        actorAuth0Sub,
+        actorUserId,
       });
 
       return updatedProfile;
     } catch (error) {
-      logger.error('Error admin updating user profile', { error, auth0Sub, updates, actorAuth0Sub });
+      logger.error('Error admin updating user profile', { error, userId, updates, actorUserId });
       throw error;
     }
   }
@@ -328,12 +328,12 @@ export class UserProfileService {
   // ============================================
 
   /**
-   * Request account deletion
+   * Request account deletion by UUID
    * Sets 30-day grace period before permanent deletion
    * Note: User is already authenticated via JWT, confirmation text is sufficient
    */
   async requestDeletion(
-    auth0Sub: string,
+    userId: string,
     confirmationText: string
   ): Promise<UserProfile> {
     try {
@@ -343,7 +343,7 @@ export class UserProfileService {
       }
 
       // Get user profile
-      const profile = await this.repository.getByAuth0Sub(auth0Sub);
+      const profile = await this.repository.getById(userId);
       if (!profile) {
         throw new Error('User not found');
       }
@@ -354,14 +354,14 @@ export class UserProfileService {
       }
 
       // Request deletion
-      const updatedProfile = await this.repository.requestDeletion(auth0Sub);
+      const updatedProfile = await this.repository.requestDeletion(userId);
 
       // Log to audit trail
       if (this.adminRepository) {
         await this.adminRepository.logAuditAction(
-          auth0Sub,
+          userId,
           'REQUEST_DELETION',
-          auth0Sub,
+          userId,
           'user_profile',
           updatedProfile.id,
           {
@@ -371,42 +371,42 @@ export class UserProfileService {
       }
 
       logger.info('Account deletion requested', {
-        auth0Sub,
+        userId,
         deletionScheduledFor: updatedProfile.deletionScheduledFor,
       });
 
       return updatedProfile;
     } catch (error) {
-      logger.error('Error requesting account deletion', { error, auth0Sub });
+      logger.error('Error requesting account deletion', { error, userId });
       throw error;
     }
   }
 
   /**
-   * Cancel pending deletion request
+   * Cancel pending deletion request by UUID
    */
-  async cancelDeletion(auth0Sub: string): Promise<UserProfile> {
+  async cancelDeletion(userId: string): Promise<UserProfile> {
     try {
       // Cancel deletion
-      const updatedProfile = await this.repository.cancelDeletion(auth0Sub);
+      const updatedProfile = await this.repository.cancelDeletion(userId);
 
       // Log to audit trail
       if (this.adminRepository) {
         await this.adminRepository.logAuditAction(
-          auth0Sub,
+          userId,
           'CANCEL_DELETION',
-          auth0Sub,
+          userId,
           'user_profile',
           updatedProfile.id,
           {}
         );
       }
 
-      logger.info('Account deletion canceled', { auth0Sub });
+      logger.info('Account deletion canceled', { userId });
 
       return updatedProfile;
     } catch (error) {
-      logger.error('Error canceling account deletion', { error, auth0Sub });
+      logger.error('Error canceling account deletion', { error, userId });
       throw error;
     }
   }
@@ -438,22 +438,22 @@ export class UserProfileService {
   }
 
   /**
-   * Admin hard delete user (permanent deletion)
+   * Admin hard delete user by UUID (permanent deletion)
    * Prevents self-delete
    */
   async adminHardDeleteUser(
-    auth0Sub: string,
-    actorAuth0Sub: string,
+    userId: string,
+    actorUserId: string,
     reason?: string
   ): Promise<void> {
     try {
       // Prevent self-delete
-      if (auth0Sub === actorAuth0Sub) {
+      if (userId === actorUserId) {
         throw new Error('Cannot delete your own account');
       }
 
       // Get user profile before deletion for audit log
-      const profile = await this.repository.getByAuth0Sub(auth0Sub);
+      const profile = await this.repository.getById(userId);
       if (!profile) {
         throw new Error('User not found');
       }
@@ -461,9 +461,9 @@ export class UserProfileService {
       // Log to audit trail before deletion
       if (this.adminRepository) {
         await this.adminRepository.logAuditAction(
-          actorAuth0Sub,
+          actorUserId,
           'HARD_DELETE_USER',
-          auth0Sub,
+          userId,
           'user_profile',
           profile.id,
           {
@@ -475,18 +475,20 @@ export class UserProfileService {
       }
 
       // Hard delete from database
-      await this.repository.hardDeleteUser(auth0Sub);
+      await this.repository.hardDeleteUser(userId);
 
-      // Delete from Auth0
-      await auth0ManagementClient.deleteUser(auth0Sub);
+      // Delete from Auth0 (using auth0Sub for Auth0 API)
+      if (profile.auth0Sub) {
+        await auth0ManagementClient.deleteUser(profile.auth0Sub);
+      }
 
       logger.info('User hard deleted by admin', {
-        auth0Sub,
-        actorAuth0Sub,
+        userId,
+        actorUserId,
         reason,
       });
     } catch (error) {
-      logger.error('Error hard deleting user', { error, auth0Sub, actorAuth0Sub });
+      logger.error('Error hard deleting user', { error, userId, actorUserId });
       throw error;
     }
   }

frontend/src/features/admin/__tests__/AdminUsersPage.test.tsx

@@ -48,7 +48,8 @@ describe('AdminUsersPage', () => {
     mockUseAdminAccess.mockReturnValue({
       isAdmin: true,
       adminRecord: {
-        auth0Sub: 'auth0|123',
+        id: 'admin-uuid-123',
+        userProfileId: 'user-uuid-123',
         email: 'admin@example.com',
         role: 'admin',
         createdAt: '2024-01-01',

frontend/src/features/admin/__tests__/useAdminAccess.test.tsx

@@ -55,7 +55,8 @@ describe('useAdminAccess', () => {
     mockAdminApi.verifyAccess.mockResolvedValue({
       isAdmin: true,
       adminRecord: {
-        auth0Sub: 'auth0|123',
+        id: 'admin-uuid-123',
+        userProfileId: 'user-uuid-123',
         email: 'admin@example.com',
         role: 'admin',
         createdAt: '2024-01-01',

frontend/src/features/admin/__tests__/useAdmins.test.tsx

@@ -42,7 +42,8 @@ describe('Admin user management hooks', () => {
     it('should fetch admin users', async () => {
       const mockAdmins = [
         {
-          auth0Sub: 'auth0|123',
+          id: 'admin-uuid-123',
+          userProfileId: 'user-uuid-123',
           email: 'admin1@example.com',
           role: 'admin',
           createdAt: '2024-01-01',
@@ -68,11 +69,12 @@ describe('Admin user management hooks', () => {
   describe('useCreateAdmin', () => {
     it('should create admin and show success toast', async () => {
       const newAdmin = {
-        auth0Sub: 'auth0|456',
+        id: 'admin-uuid-456',
+        userProfileId: 'user-uuid-456',
         email: 'newadmin@example.com',
         role: 'admin',
         createdAt: '2024-01-01',
-        createdBy: 'auth0|123',
+        createdBy: 'admin-uuid-123',
         revokedAt: null,
         updatedAt: '2024-01-01',
       };
@@ -131,11 +133,11 @@ describe('Admin user management hooks', () => {
         wrapper: createWrapper(),
       });
 
-      result.current.mutate('auth0|123');
+      result.current.mutate('admin-uuid-123');
 
       await waitFor(() => expect(result.current.isSuccess).toBe(true));
 
-      expect(mockAdminApi.revokeAdmin).toHaveBeenCalledWith('auth0|123');
+      expect(mockAdminApi.revokeAdmin).toHaveBeenCalledWith('admin-uuid-123');
       expect(toast.success).toHaveBeenCalledWith('Admin revoked successfully');
     });
   });
@@ -148,11 +150,11 @@ describe('Admin user management hooks', () => {
         wrapper: createWrapper(),
       });
 
-      result.current.mutate('auth0|123');
+      result.current.mutate('admin-uuid-123');
 
       await waitFor(() => expect(result.current.isSuccess).toBe(true));
 
-      expect(mockAdminApi.reinstateAdmin).toHaveBeenCalledWith('auth0|123');
+      expect(mockAdminApi.reinstateAdmin).toHaveBeenCalledWith('admin-uuid-123');
       expect(toast.success).toHaveBeenCalledWith('Admin reinstated successfully');
     });
   });

frontend/src/features/admin/api/admin.api.ts

@@ -101,12 +101,12 @@ export const adminApi = {
     return response.data;
   },
 
-  revokeAdmin: async (auth0Sub: string): Promise<void> => {
-    await apiClient.patch(`/admin/admins/${auth0Sub}/revoke`);
+  revokeAdmin: async (id: string): Promise<void> => {
+    await apiClient.patch(`/admin/admins/${id}/revoke`);
   },
 
-  reinstateAdmin: async (auth0Sub: string): Promise<void> => {
-    await apiClient.patch(`/admin/admins/${auth0Sub}/reinstate`);
+  reinstateAdmin: async (id: string): Promise<void> => {
+    await apiClient.patch(`/admin/admins/${id}/reinstate`);
   },
 
   // Audit logs
@@ -328,62 +328,62 @@ export const adminApi = {
       return response.data;
     },
 
-    get: async (auth0Sub: string): Promise<ManagedUser> => {
+    get: async (userId: string): Promise<ManagedUser> => {
       const response = await apiClient.get<ManagedUser>(
-        `/admin/users/${encodeURIComponent(auth0Sub)}`
+        `/admin/users/${userId}`
       );
       return response.data;
     },
 
-    getVehicles: async (auth0Sub: string): Promise<AdminUserVehiclesResponse> => {
+    getVehicles: async (userId: string): Promise<AdminUserVehiclesResponse> => {
       const response = await apiClient.get<AdminUserVehiclesResponse>(
-        `/admin/users/${encodeURIComponent(auth0Sub)}/vehicles`
+        `/admin/users/${userId}/vehicles`
       );
       return response.data;
     },
 
-    updateTier: async (auth0Sub: string, data: UpdateUserTierRequest): Promise<ManagedUser> => {
+    updateTier: async (userId: string, data: UpdateUserTierRequest): Promise<ManagedUser> => {
       const response = await apiClient.patch<ManagedUser>(
-        `/admin/users/${encodeURIComponent(auth0Sub)}/tier`,
+        `/admin/users/${userId}/tier`,
         data
       );
       return response.data;
     },
 
-    deactivate: async (auth0Sub: string, data?: DeactivateUserRequest): Promise<ManagedUser> => {
+    deactivate: async (userId: string, data?: DeactivateUserRequest): Promise<ManagedUser> => {
       const response = await apiClient.patch<ManagedUser>(
-        `/admin/users/${encodeURIComponent(auth0Sub)}/deactivate`,
+        `/admin/users/${userId}/deactivate`,
         data || {}
       );
       return response.data;
     },
 
-    reactivate: async (auth0Sub: string): Promise<ManagedUser> => {
+    reactivate: async (userId: string): Promise<ManagedUser> => {
       const response = await apiClient.patch<ManagedUser>(
-        `/admin/users/${encodeURIComponent(auth0Sub)}/reactivate`
+        `/admin/users/${userId}/reactivate`
       );
       return response.data;
     },
 
-    updateProfile: async (auth0Sub: string, data: UpdateUserProfileRequest): Promise<ManagedUser> => {
+    updateProfile: async (userId: string, data: UpdateUserProfileRequest): Promise<ManagedUser> => {
       const response = await apiClient.patch<ManagedUser>(
-        `/admin/users/${encodeURIComponent(auth0Sub)}/profile`,
+        `/admin/users/${userId}/profile`,
         data
       );
       return response.data;
     },
 
-    promoteToAdmin: async (auth0Sub: string, data?: PromoteToAdminRequest): Promise<AdminUser> => {
+    promoteToAdmin: async (userId: string, data?: PromoteToAdminRequest): Promise<AdminUser> => {
       const response = await apiClient.patch<AdminUser>(
-        `/admin/users/${encodeURIComponent(auth0Sub)}/promote`,
+        `/admin/users/${userId}/promote`,
         data || {}
       );
       return response.data;
     },
 
-    hardDelete: async (auth0Sub: string, reason?: string): Promise<{ message: string }> => {
+    hardDelete: async (userId: string, reason?: string): Promise<{ message: string }> => {
       const response = await apiClient.delete<{ message: string }>(
-        `/admin/users/${encodeURIComponent(auth0Sub)}`,
+        `/admin/users/${userId}`,
         { params: reason ? { reason } : undefined }
       );
       return response.data;

frontend/src/features/admin/hooks/useAdmins.ts

@@ -51,7 +51,7 @@ export const useRevokeAdmin = () => {
   const queryClient = useQueryClient();
 
   return useMutation({
-    mutationFn: (auth0Sub: string) => adminApi.revokeAdmin(auth0Sub),
+    mutationFn: (id: string) => adminApi.revokeAdmin(id),
     onSuccess: () => {
       queryClient.invalidateQueries({ queryKey: ['admins'] });
       toast.success('Admin revoked successfully');
@@ -66,7 +66,7 @@ export const useReinstateAdmin = () => {
   const queryClient = useQueryClient();
 
   return useMutation({
-    mutationFn: (auth0Sub: string) => adminApi.reinstateAdmin(auth0Sub),
+    mutationFn: (id: string) => adminApi.reinstateAdmin(id),
     onSuccess: () => {
       queryClient.invalidateQueries({ queryKey: ['admins'] });
       toast.success('Admin reinstated successfully');

frontend/src/features/admin/hooks/useUsers.ts

@@ -29,8 +29,8 @@ interface ApiError {
 export const userQueryKeys = {
   all: ['admin-users'] as const,
   list: (params: ListUsersParams) => [...userQueryKeys.all, 'list', params] as const,
-  detail: (auth0Sub: string) => [...userQueryKeys.all, 'detail', auth0Sub] as const,
-  vehicles: (auth0Sub: string) => [...userQueryKeys.all, 'vehicles', auth0Sub] as const,
+  detail: (userId: string) => [...userQueryKeys.all, 'detail', userId] as const,
+  vehicles: (userId: string) => [...userQueryKeys.all, 'vehicles', userId] as const,
 };
 
 // Query keys for admin stats
@@ -58,13 +58,13 @@ export const useUsers = (params: ListUsersParams = {}) => {
 /**
  * Hook to get a single user's details
  */
-export const useUser = (auth0Sub: string) => {
+export const useUser = (userId: string) => {
   const { isAuthenticated, isLoading } = useAuth0();
 
   return useQuery({
-    queryKey: userQueryKeys.detail(auth0Sub),
-    queryFn: () => adminApi.users.get(auth0Sub),
-    enabled: isAuthenticated && !isLoading && !!auth0Sub,
+    queryKey: userQueryKeys.detail(userId),
+    queryFn: () => adminApi.users.get(userId),
+    enabled: isAuthenticated && !isLoading && !!userId,
     staleTime: 2 * 60 * 1000,
     gcTime: 5 * 60 * 1000,
     retry: 1,
@@ -78,8 +78,8 @@ export const useUpdateUserTier = () => {
   const queryClient = useQueryClient();
 
   return useMutation({
-    mutationFn: ({ auth0Sub, data }: { auth0Sub: string; data: UpdateUserTierRequest }) =>
-      adminApi.users.updateTier(auth0Sub, data),
+    mutationFn: ({ userId, data }: { userId: string; data: UpdateUserTierRequest }) =>
+      adminApi.users.updateTier(userId, data),
     onSuccess: () => {
       queryClient.invalidateQueries({ queryKey: userQueryKeys.all });
       toast.success('Subscription tier updated');
@@ -101,8 +101,8 @@ export const useDeactivateUser = () => {
   const queryClient = useQueryClient();
 
   return useMutation({
-    mutationFn: ({ auth0Sub, data }: { auth0Sub: string; data?: DeactivateUserRequest }) =>
-      adminApi.users.deactivate(auth0Sub, data),
+    mutationFn: ({ userId, data }: { userId: string; data?: DeactivateUserRequest }) =>
+      adminApi.users.deactivate(userId, data),
     onSuccess: () => {
       queryClient.invalidateQueries({ queryKey: userQueryKeys.all });
       toast.success('User deactivated');
@@ -124,7 +124,7 @@ export const useReactivateUser = () => {
   const queryClient = useQueryClient();
 
   return useMutation({
-    mutationFn: (auth0Sub: string) => adminApi.users.reactivate(auth0Sub),
+    mutationFn: (userId: string) => adminApi.users.reactivate(userId),
     onSuccess: () => {
       queryClient.invalidateQueries({ queryKey: userQueryKeys.all });
       toast.success('User reactivated');
@@ -146,8 +146,8 @@ export const useUpdateUserProfile = () => {
   const queryClient = useQueryClient();
 
   return useMutation({
-    mutationFn: ({ auth0Sub, data }: { auth0Sub: string; data: UpdateUserProfileRequest }) =>
-      adminApi.users.updateProfile(auth0Sub, data),
+    mutationFn: ({ userId, data }: { userId: string; data: UpdateUserProfileRequest }) =>
+      adminApi.users.updateProfile(userId, data),
     onSuccess: () => {
       queryClient.invalidateQueries({ queryKey: userQueryKeys.all });
       toast.success('User profile updated');
@@ -169,8 +169,8 @@ export const usePromoteToAdmin = () => {
   const queryClient = useQueryClient();
 
   return useMutation({
-    mutationFn: ({ auth0Sub, data }: { auth0Sub: string; data?: PromoteToAdminRequest }) =>
-      adminApi.users.promoteToAdmin(auth0Sub, data),
+    mutationFn: ({ userId, data }: { userId: string; data?: PromoteToAdminRequest }) =>
+      adminApi.users.promoteToAdmin(userId, data),
     onSuccess: () => {
       queryClient.invalidateQueries({ queryKey: userQueryKeys.all });
       toast.success('User promoted to admin');
@@ -192,8 +192,8 @@ export const useHardDeleteUser = () => {
   const queryClient = useQueryClient();
 
   return useMutation({
-    mutationFn: ({ auth0Sub, reason }: { auth0Sub: string; reason?: string }) =>
-      adminApi.users.hardDelete(auth0Sub, reason),
+    mutationFn: ({ userId, reason }: { userId: string; reason?: string }) =>
+      adminApi.users.hardDelete(userId, reason),
     onSuccess: () => {
       queryClient.invalidateQueries({ queryKey: userQueryKeys.all });
       toast.success('User permanently deleted');
@@ -228,13 +228,13 @@ export const useAdminStats = () => {
 /**
  * Hook to get a user's vehicles (admin view - year, make, model only)
  */
-export const useUserVehicles = (auth0Sub: string) => {
+export const useUserVehicles = (userId: string) => {
   const { isAuthenticated, isLoading } = useAuth0();
 
   return useQuery({
-    queryKey: userQueryKeys.vehicles(auth0Sub),
-    queryFn: () => adminApi.users.getVehicles(auth0Sub),
-    enabled: isAuthenticated && !isLoading && !!auth0Sub,
+    queryKey: userQueryKeys.vehicles(userId),
+    queryFn: () => adminApi.users.getVehicles(userId),
+    enabled: isAuthenticated && !isLoading && !!userId,
     staleTime: 2 * 60 * 1000,
     gcTime: 5 * 60 * 1000,
     retry: 1,

frontend/src/features/admin/mobile/AdminUsersMobileScreen.tsx

@@ -104,8 +104,8 @@ const VehicleCountBadge: React.FC<{ count: number; onClick?: () => void }> = ({
 );
 
 // Expandable vehicle list component
-const UserVehiclesList: React.FC<{ auth0Sub: string; isOpen: boolean }> = ({ auth0Sub, isOpen }) => {
-  const { data, isLoading, error } = useUserVehicles(auth0Sub);
+const UserVehiclesList: React.FC<{ userId: string; isOpen: boolean }> = ({ userId, isOpen }) => {
+  const { data, isLoading, error } = useUserVehicles(userId);
 
   if (!isOpen) return null;
 
@@ -215,7 +215,7 @@ export const AdminUsersMobileScreen: React.FC = () => {
     (newTier: SubscriptionTier) => {
       if (selectedUser) {
         updateTierMutation.mutate(
-          { auth0Sub: selectedUser.auth0Sub, data: { subscriptionTier: newTier } },
+          { userId: selectedUser.id, data: { subscriptionTier: newTier } },
           {
             onSuccess: () => {
               setShowTierPicker(false);
@@ -232,7 +232,7 @@ export const AdminUsersMobileScreen: React.FC = () => {
   const handleDeactivate = useCallback(() => {
     if (selectedUser) {
       deactivateMutation.mutate(
-        { auth0Sub: selectedUser.auth0Sub, data: { reason: deactivateReason || undefined } },
+        { userId: selectedUser.id, data: { reason: deactivateReason || undefined } },
         {
           onSuccess: () => {
             setShowDeactivateConfirm(false);
@@ -247,7 +247,7 @@ export const AdminUsersMobileScreen: React.FC = () => {
 
   const handleReactivate = useCallback(() => {
     if (selectedUser) {
-      reactivateMutation.mutate(selectedUser.auth0Sub, {
+      reactivateMutation.mutate(selectedUser.id, {
         onSuccess: () => {
           setShowUserActions(false);
           setSelectedUser(null);
@@ -276,7 +276,7 @@ export const AdminUsersMobileScreen: React.FC = () => {
       }
       if (Object.keys(updates).length > 0) {
         updateProfileMutation.mutate(
-          { auth0Sub: selectedUser.auth0Sub, data: updates },
+          { userId: selectedUser.id, data: updates },
           {
             onSuccess: () => {
               setShowEditModal(false);
@@ -306,7 +306,7 @@ export const AdminUsersMobileScreen: React.FC = () => {
   const handlePromoteConfirm = useCallback(() => {
     if (selectedUser) {
       promoteToAdminMutation.mutate(
-        { auth0Sub: selectedUser.auth0Sub, data: { role: promoteRole } },
+        { userId: selectedUser.id, data: { role: promoteRole } },
         {
           onSuccess: () => {
             setShowPromoteModal(false);
@@ -332,7 +332,7 @@ export const AdminUsersMobileScreen: React.FC = () => {
   const handleHardDeleteConfirm = useCallback(() => {
     if (selectedUser && hardDeleteConfirmText === 'DELETE') {
       hardDeleteMutation.mutate(
-        { auth0Sub: selectedUser.auth0Sub, reason: hardDeleteReason || undefined },
+        { userId: selectedUser.id, reason: hardDeleteReason || undefined },
         {
           onSuccess: () => {
             setShowHardDeleteModal(false);
@@ -509,7 +509,7 @@ export const AdminUsersMobileScreen: React.FC = () => {
         {users.length > 0 && (
           <div className="space-y-3">
             {users.map((user) => (
-              <GlassCard key={user.auth0Sub} padding="md">
+              <GlassCard key={user.id} padding="md">
                 <button
                   onClick={() => handleUserClick(user)}
                   className="w-full text-left min-h-[44px]"
@@ -526,7 +526,7 @@ export const AdminUsersMobileScreen: React.FC = () => {
                         <VehicleCountBadge
                           count={user.vehicleCount}
                           onClick={user.vehicleCount > 0 ? () => setExpandedUserId(
-                            expandedUserId === user.auth0Sub ? null : user.auth0Sub
+                            expandedUserId === user.id ? null : user.id
                           ) : undefined}
                         />
                         <StatusBadge active={!user.deactivatedAt} />
@@ -543,8 +543,8 @@ export const AdminUsersMobileScreen: React.FC = () => {
                   </div>
                 </button>
                 <UserVehiclesList
-                  auth0Sub={user.auth0Sub}
-                  isOpen={expandedUserId === user.auth0Sub}
+                  userId={user.id}
+                  isOpen={expandedUserId === user.id}
                 />
               </GlassCard>
             ))}

frontend/src/features/admin/types/admin.types.ts

@@ -5,7 +5,8 @@
 
 // Admin user types
 export interface AdminUser {
-  auth0Sub: string;
+  id: string;
+  userProfileId: string;
   email: string;
   role: string;
   createdAt: string;

frontend/src/pages/admin/AdminUsersPage.tsx

@@ -71,8 +71,8 @@ import { AdminSectionHeader } from '../../features/admin/components';
 const PAGE_SIZE_OPTIONS = [10, 20, 50, 100];
 
 // Expandable vehicle row component
-const UserVehiclesRow: React.FC<{ auth0Sub: string; isOpen: boolean }> = ({ auth0Sub, isOpen }) => {
-  const { data, isLoading, error } = useUserVehicles(auth0Sub);
+const UserVehiclesRow: React.FC<{ userId: string; isOpen: boolean }> = ({ userId, isOpen }) => {
+  const { data, isLoading, error } = useUserVehicles(userId);
 
   if (!isOpen) return null;
 
@@ -222,8 +222,8 @@ export const AdminUsersPage: React.FC = () => {
   }, []);
 
   const handleTierChange = useCallback(
-    (auth0Sub: string, newTier: SubscriptionTier) => {
-      updateTierMutation.mutate({ auth0Sub, data: { subscriptionTier: newTier } });
+    (userId: string, newTier: SubscriptionTier) => {
+      updateTierMutation.mutate({ userId, data: { subscriptionTier: newTier } });
     },
     [updateTierMutation]
   );
@@ -246,7 +246,7 @@ export const AdminUsersPage: React.FC = () => {
   const handleDeactivateConfirm = useCallback(() => {
     if (selectedUser) {
       deactivateMutation.mutate(
-        { auth0Sub: selectedUser.auth0Sub, data: { reason: deactivateReason || undefined } },
+        { userId: selectedUser.id, data: { reason: deactivateReason || undefined } },
         {
           onSuccess: () => {
             setDeactivateDialogOpen(false);
@@ -260,7 +260,7 @@ export const AdminUsersPage: React.FC = () => {
 
   const handleReactivate = useCallback(() => {
     if (selectedUser) {
-      reactivateMutation.mutate(selectedUser.auth0Sub);
+      reactivateMutation.mutate(selectedUser.id);
       setAnchorEl(null);
       setSelectedUser(null);
     }
@@ -286,7 +286,7 @@ export const AdminUsersPage: React.FC = () => {
       }
       if (Object.keys(updates).length > 0) {
         updateProfileMutation.mutate(
-          { auth0Sub: selectedUser.auth0Sub, data: updates },
+          { userId: selectedUser.id, data: updates },
           {
             onSuccess: () => {
               setEditDialogOpen(false);
@@ -316,7 +316,7 @@ export const AdminUsersPage: React.FC = () => {
   const handlePromoteConfirm = useCallback(() => {
     if (selectedUser) {
       promoteToAdminMutation.mutate(
-        { auth0Sub: selectedUser.auth0Sub, data: { role: promoteRole } },
+        { userId: selectedUser.id, data: { role: promoteRole } },
         {
           onSuccess: () => {
             setPromoteDialogOpen(false);
@@ -342,7 +342,7 @@ export const AdminUsersPage: React.FC = () => {
   const handleHardDeleteConfirm = useCallback(() => {
     if (selectedUser && hardDeleteConfirmText === 'DELETE') {
       hardDeleteMutation.mutate(
-        { auth0Sub: selectedUser.auth0Sub, reason: hardDeleteReason || undefined },
+        { userId: selectedUser.id, reason: hardDeleteReason || undefined },
         {
           onSuccess: () => {
             setHardDeleteDialogOpen(false);
@@ -496,11 +496,11 @@ export const AdminUsersPage: React.FC = () => {
                 </TableHead>
                 <TableBody>
                   {users.map((user) => (
-                    <React.Fragment key={user.auth0Sub}>
+                    <React.Fragment key={user.id}>
                       <TableRow
                         sx={{
                           opacity: user.deactivatedAt ? 0.6 : 1,
-                          '& > *': { borderBottom: expandedRow === user.auth0Sub ? 'unset' : undefined },
+                          '& > *': { borderBottom: expandedRow === user.id ? 'unset' : undefined },
                         }}
                       >
                         <TableCell>{user.email}</TableCell>
@@ -510,7 +510,7 @@ export const AdminUsersPage: React.FC = () => {
                             <Select
                               value={user.subscriptionTier}
                               onChange={(e) =>
-                                handleTierChange(user.auth0Sub, e.target.value as SubscriptionTier)
+                                handleTierChange(user.id, e.target.value as SubscriptionTier)
                               }
                               disabled={!!user.deactivatedAt || updateTierMutation.isPending}
                               size="small"
@@ -527,12 +527,12 @@ export const AdminUsersPage: React.FC = () => {
                               <IconButton
                                 size="small"
                                 onClick={() => setExpandedRow(
-                                  expandedRow === user.auth0Sub ? null : user.auth0Sub
+                                  expandedRow === user.id ? null : user.id
                                 )}
                                 aria-label="show vehicles"
                                 sx={{ minWidth: 44, minHeight: 44 }}
                               >
-                                {expandedRow === user.auth0Sub ? (
+                                {expandedRow === user.id ? (
                                   <KeyboardArrowUp fontSize="small" />
                                 ) : (
                                   <KeyboardArrowDown fontSize="small" />
@@ -569,8 +569,8 @@ export const AdminUsersPage: React.FC = () => {
                         </TableCell>
                       </TableRow>
                       <UserVehiclesRow
-                        auth0Sub={user.auth0Sub}
-                        isOpen={expandedRow === user.auth0Sub}
+                        userId={user.id}
+                        isOpen={expandedRow === user.id}
                       />
                     </React.Fragment>
                   ))}