docs: def get_profile_model():
      """
      Return the model class for the currently-active user profile
      model, as defined by the ``AUTH_PROFILE_MODULE`` setting.
  
      :return: The model that is used as profile.
      """
      if (not hasattr(settings, 'AUTH_PROFILE_MODULE') or
              not settings.AUTH_PROFILE_MODULE):
          raise SiteProfileNotAvailable
  
      profile_mod = get_model(*settings.AUTH_PROFILE_MODULE.split('.'))
      if profile_mod is None:
          raise SiteProfileNotAvailable
      return profile_mod