api: fixed problems with repository fork/create using celery backend.

- fixes  #5462

rhodecode/api/views/repo_api.py

@@ -698,7 +698,7 b' def create_repo('
             'repo_copy_permissions': schema_data['repo_copy_permissions'],
         }
 
-        task = RepoModel().create(form_data=data, cur_user=owner)
+        task = RepoModel().create(form_data=data, cur_user=owner.user_id)
         task_id = get_task_id(task)
         # no commit, it's done in RepoModel, or async via celery
         return {
@@ -1096,7 +1096,7 b' def fork_repo(request, apiuser, repoid, '
             'landing_rev': schema_data['repo_landing_commit_ref'],
         }
 
-        task = RepoModel().create_fork(data, cur_user=owner)
+        task = RepoModel().create_fork(data, cur_user=owner.user_id)
         # no commit, it's done in RepoModel, or async via celery
         task_id = get_task_id(task)