code: func (h *Handler) GetChannelsUsage(tkn string, ids []string) (map[string]Usage, error) {
  	logger := h.logger.Add("method", "GetChannelsUsage", "objectType", "channel", "objectIDs", ids)
  
  	if !h.token.Check(tkn) {
  		logger.Warn("access denied")
  		return nil, ErrAccessDenied
  	}
  
  	return h.getChannelsUsages(logger, ids)
  }
docs: // GetChannelsUsage returns detailed usage on channels.