fix: use foreign key cascade delete for user cleanup (#188)

migrations/20231130150000_user_id_foreign_key.sql

@@ -0,0 +1,21 @@
+-- Revert the last migration
+REVOKE SELECT, INSERT, UPDATE, DELETE ON public.af_user FROM supabase_auth_admin;
+DROP TRIGGER delete_user_trigger ON auth.users;
+DROP TRIGGER update_af_user_deleted_at_trigger ON auth.users;
+DROP FUNCTION public.delete_user();
+DROP FUNCTION public.update_af_user_deleted_at();
+
+-- Delete all users from public.af_user table that are not in auth.users table
+DELETE FROM public.af_user
+WHERE NOT EXISTS (
+    SELECT 1
+    FROM auth.users
+    WHERE af_user.uuid = users.id
+);
+
+-- Add foreign key constraint to public.af_user table
+ALTER TABLE public.af_user
+ADD CONSTRAINT af_user_email_foreign_key
+FOREIGN KEY (uuid)
+REFERENCES auth.users(id)
+ON DELETE CASCADE;