old_contents: const express = require('express');
  const router = express.Router();
  
  router.get('/', (req, res, next) => {
    res.render('users/login');
  });
  
  module.exports = router;
  
new_contents: const express = require('express');
  const router = express.Router();
  
  router.get('/login', (req, res, next) => {
    res.render('users/login');
  });
  
  router.get('/signup', (req, res, next) => {
    res.render('users/signup');
  });
  
  module.exports = router;
  
subject: update to user routes for login and signup