Advanced Node and Express - Registration of New Users - having issues passing the challenges

1

I tried using the forums and I’ve completed 3 out of the 5 challenges. The only two that won’t pass are registering should work and login should work. Any suggestions I could try?

mongo.connect(process.env.DATABASE, (err, db) => {
  if(err) {
    console.log('Database error: ' + err);
  } else {
    console.log('Successful database connection');

    //serialization and app.listen
  }
});

passport.use(new LocalStrategy(
  function(username, password, done) {
    db.collection('users').findOne({ username: username }, function (err, user) {
      console.log('User '+ username +' attempted to log in.');
      if (err) { return done(err); }
      if (!user) { return done(null, false); }
      if (password !== user.password) { return done(null, false); }
      return done(null, user);
    });
  }
));

app.set('view engine', 'pug');

function ensureAuthenticated(req, res, next) {
  if (req.isAuthenticated()) {
    return next();
  }
  res.redirect('/');
};

app.route("/").get((req, res) => { 
  //Change the response to render the Pug template
res.render(process.cwd() + '/views/pug/index.pug', {title: "Home Page", message: 'Please login', showLogin: true, showRegistration: true});
});

app.route('/login')
          .post(passport.authenticate('local', { failureRedirect: '/' }),(req,res) => {
               res.redirect('/profile');
        console.log(`User ${req.user} attempted to log in.`);

  res.redirect('/');
          });

        app.route('/profile')
          .get(ensureAuthenticated,(req,res) => {
               res.render(process.cwd() + '/views/pug/profile.pug'+ { username: req.user.username });
        });

app.route('/register')
  .post((req, res, next) => {
    db.collection('users').findOne({ username: req.body.username }, function(err, user) {
      if (err) {
        next(err);
      } else if (user) {
        res.redirect('/');
      } else {
        db.collection('users').insertOne({
          username: req.body.username,
          password: req.body.password
        },
          (err, doc) => {
            if (err) {
              res.redirect('/');
            } else {
              next(null, user);
            }
          }
        )
      }
    })
  },
    passport.authenticate('local', { failureRedirect: '/' }),
    (req, res, next) => {
      res.redirect('/profile');
    }
  );

app.route('/logout')
  .get((req, res) => {
    req.logout();
    res.redirect("/");
});

app.use((req, res, next) => {
  res.status(404)
    .type('text')
    .send('Not Found');
});

app.listen(process.env.PORT || 3000, () => {
  console.log("Listening on port " + process.env.PORT);
});

Here’s my project page: