def testRegisterExisting(self):
    self._tester.RegisterViewfinderUser(self._viewfinder_user_dict)
    self.assertRaisesHttpError(403,
                               self._tester.RegisterViewfinderUser,
                               self._viewfinder_user_dict,
                               self._mobile_device_dict)
ERROR: Try to register a user that already exists.
dataset/ETHPy150Open viewfinderco/viewfinder/backend/www/test/auth_test.py/AuthTestCase.testRegisterExisting