Sessions on nodejs

sessions.js

var express = require('express');
var bodyParser = require('body-parser');
var expressSession = require('express-session');
var cookieParser = require('cookie-parser');
var app = express();

app.use(cookieParser());
app.use(expressSession({secret:'nicetoken'}));
app.use(bodyParser());

//Set time in conversor
var sessionMinute =  (1000 * 60);
app.get('/session', function(req, res){
  var html = '';
  //Control session max time
  const expireSession = sessionMinute * req.query.timeSession
  //expireSession *= req.query.timeSession;

  req.session.cookie.maxAge = expireSession;

  if(req.session.cont === undefined)
    req.session.cont = 0

  if (req.session) {
    req.session.cont++
    text = JSON.stringify(req.session);
    id = req.sessionID;
    html += 'cont session is: ' + req.session.cont +
    '</br>Your ID is: ' + req.sessionID +
    '</br>Time Sessions in ms is: ' + req.session.cookie.maxAge;
  }

  res.send(html);
});
app.listen(3000);

//run on browser for one minute session
//http://localhost:3000/session?timeSession=1