ktvmanager/routes/login.js

var express = require('express');
var router = express.Router();

/* GET home page. */
router.get('/', function (req, res, next) {
  const options = {
    domain: 'vps.k-world.me.uk',
    httpOnly: false,
    sameSite: false,
    signed: false,
    path: '/'
    // overwrite: true
  }
  try {
    if (req.auth.user === 'Karl') {
      res.cookie('user', 1, options)
    }
    else if (req.auth.user === 'Darren') {
      res.cookie('user', 2, options)
    }
    else if (req.auth.user === 'Duly') {
      res.cookie('user', 3, options)
    }
  } catch (error) {
    res.send({ auth: 'Fail' });
  }
  res.send({ auth: 'Success' });
});

module.exports = router;