Why does the passport.js create an Unauthorized page on its own when authentication fails? how can I-CodePudding

here is my router:

  router.post('/login', 
  passport.authenticate('local'),
  (req, res, next) => {
    body('backurl').trim().escape();
    let referrer = req.get('Referrer')
    if (!req.user) {
      return res.render('login', {
        message: 'Unable to login, the password or the username are wrong',
        backUrl: referrer
      });
    }
    if (req.body.backurl == null || req.body.backurl == 'http://localhost:3000/signup' || req.body.backurl == 'http://localhost:3000/login') {
      return res.redirect('/yourcourses');
    }
    
    return res.redirect(req.body.backurl);
  }
);

When the user and the local authentication works it does work perfectly, however on fail I want to render the login page again with a message and a variable, however on failure the website simply makes an empty page with the word "unauthorized" on it without anything else, how do I fix it? thanks!

CodePudding user response：