old_contents: 
  AUTHENTICATION_BACKENDS = (
      'djangae.contrib.gauth.backends.AppEngineUserAPI',
  )
  
  AUTH_USER_MODEL = 'djangae.User'
  LOGIN_URL = 'djangae_login_redirect'
  
new_contents: 
  AUTHENTICATION_BACKENDS = (
      'djangae.contrib.gauth.backends.AppEngineUserAPI',
  )
  
  AUTH_USER_MODEL = 'djangae.GaeDatastoreUser'
  LOGIN_URL = 'djangae_login_redirect'
  
subject: Fix the `AUTH_USER_MODEL` value in the example auth settings file.