def create_user(self, request, user, **kwargs):
        raise NotImplementedError('This method must be set by a subclass.')
Returns the singleton instance. Upon its first call, it creates a
dataset/ETHPy150Open bryanveloso/hello-social-registration/social_registration/backends/default/__init__.py/DefaultBackend.create_user--crossover with--dataset/ETHPy150Open smiley/steamapi/steamapi/decorators.py/Singleton.__call__