fix filter out Undefined values in user insert data

Author: fregataa

src/ai/backend/manager/models/user.py

@@ -664,10 +664,10 @@ async def mutate(
             "totp_activated": props.totp_activated,
             "resource_policy": props.resource_policy,
             "sudo_session_enabled": props.sudo_session_enabled,
-            "container_uid": props.container_uid,
-            "container_main_gid": props.container_main_gid,
-            "container_gids": props.container_gids,
         }
+        set_if_set(props, user_data, "container_uid")
+        set_if_set(props, user_data, "container_main_gid")
+        set_if_set(props, user_data, "container_gids")
         user_insert_query = sa.insert(users).values(user_data)
 
         async def _post_func(conn: SAConnection, result: Result) -> Row: