app.js

var express = require('express'),
  session = require('express-session'),
  bodyparser = require('body-parser'),
  cors = require('cors'),
  mongoose = require('mongoose'),
  morgan = require('morgan'),
  passport = require('passport'),
  flash = require('connect-flash'),
  routes = require('./server/controller/index.js'),
  cons = require('consolidate'),
  swig = require('swig')
  app = express();




var uristring = 'mongodb://127.0.0.1:27017/loyaltysplash';

////connect to mongodb
// Makes connection asynchronously.  Mongoose will queue up database
// operations and release them when the connection is complete.
mongoose.connect(uristring, function (err, res) {
  if (err) {
    // console.log('ERROR connecting to: ' + uristring + '. ' + err);
    console.log(err)
  } else {
    console.log('Succeeded connected to: ' + uristring);
  }
});



app.use(cors());
app.use(bodyparser.urlencoded({ extended: true }));
app.use(bodyparser.json());

app.use(session({ secret: 'keyboard cat' }));
// // Passport JS is what we use to handle our logins
app.use(passport.initialize());
app.use(passport.session());


// log to the console
app.use(morgan('dev'));

// // The flash middleware let's us use req.flash('error', 'Shit!'), which will then pass that message to the next page the user requests
app.use(flash());
app.use(session({ secret: 'secret', }));



// app.engine('html', require('ejs').renderFile);
app.engine('html', cons.swig);
app.set('view engine', 'html');
app.set('views', __dirname + '/views');
app.use(express.static(__dirname + '/public'));
app.use('/', routes)

app.listen(3333, function () {
  console.log(' app listening on port  3333');
});

gistfile1.txt

var express = require('express'),
    router = express.Router(),
    passport = require('passport'),
    Gambler = require('../models/gambler.js'),
    LocalStrategy = require('passport-local').Strategy;
    


passport.serializeUser(function (user, done) {
    done(null, user);
});

passport.deserializeUser(function (user, done) {
    done(null, user);
});


//============================================= LOGIN =========================================//

passport.use('user', new LocalStrategy({

    usernameField: 'email',
    passwordField: 'password',
    passReqToCallback: true
},
    function (req, email, password, done) {

        console.log(req.body);
        Gambler.findOne({ email: req.body.email }, function (err, user) {

            if (user) {
                console.log('user details in the db');
                console.log(user);
                if (user.password !== req.body.password) {
                    console.log('user not found');
                    return done(null, false, req.flash('info', 'Wrong password.'));

                } else {
                    console.log('user  found');
                    return done(null, user);

                }

            } else {

                Gambler.findOne({ email: req.body.email }, function (err, data) {


                    if (!data)
                        console.log('user not found');
                    return done(null, false, req.flash('info', 'User dsnt exist.'));

                    if (data.Password !== req.body.Password)
                        console.log('wrong password');
                    return done(null, false, req.flash('info', 'Wrong password.'));
                    return done(null, data);

                });


            }


        });

    }

));

router.post('/login', passport.authenticate('user', {
    failureRedirect: '/login',
    failureFlash: 'failed Login',
    successRedirect: '/pool50',
    successFlash: 'You are now logged in'
}));

router.post('/logins',function(req,res){
    console.log(req.body);
    res.render('index');
})

exports.logout = (req, res) => {
    req.logout();
    req.flash('success', 'You are now logged out');
    res.redirect('/');
}

const isLoggedIn = (req, res, next) => {

    if (req.isAuthenticated()) {
        next();
        return;
    }
    req.flash('error', 'You must be logged in ');
    console.log('you must be logged in');
    res.redirect('/login');

};



router.post('/api/signup', function (req, res) {
    var gambler = new Gambler();
    gambler.fullname = req.body.fullname;
    gambler.email = req.body.email;
    gambler.phone = req.body.number;
    gambler.password = req.body.password;

    gambler.save(function (err, user_obj) {
        if (err) {
            console.log(err);
            res.json({ success: false, 'message': err });
            if (err.name == 'MongoError' && err.message.indexOf('$email_1') > 0) {
                return res.json({ Error: 'Email is already registered. Please choose another' });
            } else if (err.name == 'MongoError' && err.message.indexOf('$username_1') > 0) {
                return res.json({ success: false, Error: 'Username is already taken. Please choose another' });
            }
        }
        else {
            console.log(user_obj);
            return res.status(200).json({ success: true, message: "User Registered successfully. Please login ", data: user_obj });
        }

    });
});



router.get('/pool50', isLoggedIn, function (req, res) {
    res.render('poolup50by15k');
});

router.get('/login', function (req, res) {
    res.render('login');
});

router.get('/', function (req, res) {
    res.render('index');
});


router.get('/register', function (req, res) {
    res.render('register');
});


module.exports = router;

gistfile2.txt

<!DOCTYPE html>
<html lang="en">

<head>
  <title>SportPoolNG</title>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link rel="stylesheet" href="bootstrap/css/bootstrap.min.css">
  <link rel="stylesheet" href="css/loyaltypoolng.css">
</head>

<body class="bg-light loyaltypoolng-body" onload="Load()">

  <!--NAV START [Login=No]-->
  <nav class="navbar navbar-expand-lg navbar-dark fixed-top bg-dark">
    <a class="navbar-brand" href="javascript:history.back()">
    <img src="" width="30" height="30" class="d-inline-block align-top" alt="<">
    LoyaltyPool
  </a>
  </nav>
  <!--NAV END -->

  <!--FORM START-->
  <form method="POST" action="/login" enctype="multipart/form-data" class="mx-1" style="margin-top: 5rem;">
    <div class="form-group">
      <label>Email address</label>
      <input type="email" class="form-control" aria-describedby="emailHelp" name="email" id="email" placeholder="Enter email">
    </div>
    <div class="form-group">
      <label>Password</label>
      <input type="password" class="form-control" name="password" id="password" placeholder="Password">
    </div>
    <div class="form-check">
      <label class="form-check-label">
      <input type="checkbox" class="form-check-input">
      keep me in
    </label>
    </div>
    <button type="submit" class="btn btn-primary">Log in</button>
  </form>

  <!--JavaScripts-->
  <script src="bootstrap/js/jquery.min.js"></script>
  <script src="bootstrap/js/popper.min.js"></script>
  <script src="bootstrap/js/bootstrap.min.js"></script>
  <script src="js/loyaltypoolng.js"></script>

</body>

</html>

change Log in to and it should work