code: function postAddListValue (req, res, next) {
      let key = req.body.key;
      let value = req.body.value;
      let type = req.body.type;
      let connectionId = req.body.connectionId;
      getConnection(req, res, function () {
          addListValue(key, value, type, res, next);
      }, connectionId);
  }
docs: =================== new v2 =================== list