code: def get_or_create_author(self, api_author):
          
          return Author.objects.get_or_create(site_id=self.site_id,
                                              wp_id=api_author["ID"],
                                              defaults=self.api_object_data("author", api_author))
docs: Find or create an Author object given API data.
  
          :param api_author: the API data for the Author
          :return: a tuple of an Author instance and a boolean indicating whether the author was created or not