code: function updateSubscribers(req, res, next) {
    var updateSubscribersParams = {
      _id: req.params.id
    };
  
    var subscribers = req.body.subscribers;
  
    logger.debug("Middleware: listSubscribers: ", {params: updateSubscribersParams, subscribers: subscribers});
  
    forms.updateNotifications(_.extend(req.connectionOptions, updateSubscribersParams), subscribers, formsResultHandlers(constants.resultTypes.forms, req, next));
  }
docs: Update The Subscribers Associated With A Form
  @param req
  @param res
  @param next