docs: def authors(self, *usernames):
          """
          Return the entries written by the given usernames
          When multiple tags are provided, they operate as "OR" query.
          """
          if len(usernames) == 1:
              return self.filter(**{"author__{}".format(User.USERNAME_FIELD): usernames[0]})
          else:
              return self.filter(**{"author__{}__in".format(User.USERNAME_FIELD): usernames})