'The response for creating a user will contain the extra fields.'

def test_create_with_extra_username(self):

    fake_username = uuid.uuid4().hex
    r = self.create_user(username=fake_username)
    self.assertValidUserResponse(r)
    user = self.get_user_from_response(r)
    self.assertEqual(fake_username, user.get('username'))
