NodeJs :- Getting "missing credentials" error while using local passport

I have made changes to the code. You have used passport-local-mongoose wrongly here.

   //register        if (errors.length > 0) {              res.render('register', {                errors,                name,                username,                password,                password2              });            } else {              User.findOne({ username: username }).then(user => {                if (user) {                  errors.push({ msg: 'username already exists' });                  res.render('register', {                    errors,                    name,                    username,                    password,                    password2                  });                } else {                  const newUser = new User({                  name,                  username,                  password                  });                  User.register(newUser, req.body.password, function(err, user){                      console.log(req.body)                      if(err){                          console.log(err);                          return res.render("register", {error: err.message});                      }                      passport.authenticate("local")(req, res, function(){                      req.flash("success", "Successfully Signed Up! Nice to meet you " + req.body.name);                      res.redirect('/users/login');                      });                  });                }              });            }    // forgot password    router.post('/forgot', function(req, res, next) {      async.waterfall([        function(done) {          crypto.randomBytes(20, function(err, buf) {            var token = buf.toString('hex');            done(err, token);          });        },        function(token, done) {          User.findOne({ username: req.body.username }, function(err, user) {            if (!user) {              req.flash('error', 'No account with that username address exists.');              return res.redirect('/users/forgot');            }            user.resetPasswordToken = token;            user.resetPasswordExpires = Date.now() + 3600000; // 1 hour            user.save(function(err) {              done(err, token, user);            });          });        },//reset tokenasync.waterfall([    function(done) {      User.findOne({ resetPasswordToken: req.params.token, resetPasswordExpires: { $gt: Date.now() } }, function(err, user) {        if (!user) {          req.flash('error', 'Password reset token is invalid or has expired.');          return res.redirect('back');        }        if(req.body.password === req.body.confirm) {          user.setPassword(req.body.password, function(err) {            user.resetPasswordToken = undefined;            user.resetPasswordExpires = undefined;            user.save(function(err) {              req.logIn(user, function(err) {                done(err, user);              });            });          })        } else {            req.flash("error", "Passwords do not match.");            return res.redirect('back');        }      });    },

I got a changepassword route using passport. Maybe its useful for you. Here it is:

router.post('/changepassword', passport.authenticate('jwt', { session: false }), (req, res) => {    User.findOne({ username: req.user.username })        .then(user => {            if (!user) {                return res.status(404).json({                    success: false                });            } else if (req.body.password !== req.body.confirm_password) {                return res.status(404).json({                    msg: "Wachtwoorden komen niet overeen",                    success: false                });            }            bcrypt.genSalt(10, (err, salt) => {                bcrypt.hash(req.body.password, salt, (err, hash) => {                    user.password = hash;                    user.save().then(user => {                        return res.status(201).json({                            success: true,                            msg: "Wachtwoord veranderd"                        });                    })                });            });        })        .catch(err => {            console.log(err)        })})