title: New user creation in test case
body: <p>I am trying to create a new user in django rest framework test case in order to be able to create a post action with the following code:</p>
  
  <pre><code>from django.contrib.auth.models import User
  
  user = User.objects.create_user('username', 'Pas$w0rd')
  user = authenticate(username='username', password='Pas$w0rd')
  client = APIClient()
  client.force_authenticate(user=user)
  r = client.post('/api/v1/event/', {'name': 'testevent'}, format='json')
  </code></pre>
  
  <p>Getting the following error:</p>
  
  <pre><code>  user = User.objects.create_user('username', 'Pas$w0rd')
    File "/opt/dev/wgptx/venv/lib/python2.7/site-packages/django/db/models/manager.py", line 277, in __get__
      self.model._meta.swapped,
  AttributeError: Manager isn't available; 'auth.User' has been swapped for 'account.User'
  </code></pre>
  
  <p>Any help please ?</p>