code: def challenger_by_queue(self, region, queue):
          
          url, query = LeagueApiV4Urls.challenger_by_queue(region=region, queue=queue)
          return self._raw_request(self.challenger_by_queue.__name__, region, url, query)
docs: Get the challenger league for a given queue.
  
          :param string region:   the region to execute this request on
          :param string queue:    the queue to get the challenger players for
  
          :returns: LeagueListDTO