new_contents: # -*- coding: utf-8 -*-
  from __future__ import absolute_import, unicode_literals
  
  from django.apps import AppConfig
  
  from actstream import registry
  
  class UsersAppConfig(AppConfig):
      name = 'commonrepo.users'
  
      def ready(self):
          registry.register(self.get_model('User'))
          import commonrepo.users.signals
  
subject: 更新 apps Users, 新增 UsersAppConfig 並指定 default_app_config