core: Add unique constraint to user UUID (#5004)

authentik/core/migrations/0027_alter_user_uuid.py

@@ -0,0 +1,19 @@
+# Generated by Django 4.1.7 on 2023-03-19 21:57
+
+import uuid
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ("authentik_core", "0026_alter_propertymapping_name_alter_provider_name"),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name="user",
+            name="uuid",
+            field=models.UUIDField(default=uuid.uuid4, editable=False, unique=True),
+        ),
+    ]

authentik/core/models.py

@@ -146,7 +146,7 @@ class UserManager(DjangoUserManager):
 class User(SerializerModel, GuardianUserMixin, AbstractUser):
     """Custom User model to allow easier adding of user-based settings"""
 
-    uuid = models.UUIDField(default=uuid4, editable=False)
+    uuid = models.UUIDField(default=uuid4, editable=False, unique=True)
     name = models.TextField(help_text=_("User's display name."))
     path = models.TextField(default="users")