docs: function getToken(params) {
  
        var api = params.api;
        var data = params.data;
        var operator = params.operator;
        var t = params.t;
        var token = params.token;
  
        if (!api || !data || !operator || !t || !token) {
            return;
        }
  
        var SPLIT_STR = "&";
  
        return md5([api, data, operator, t, token].join(SPLIT_STR));
  
      }