index.js

const express = require("express"),
    mongoose = require("mongoose"),
    User = require("./models/user"),
    passport = require("passport"),
    LocalStrategy = require("passport-local"),
    passportLocalMongoose = require("passport-local-mongoose"),
    cookieParser = require('cookie-parser'),
    connectFlash = require('connect-flash');
    require('dotenv').config()
    mongoose.connect(process.env.MONGO_URI,
        { 
        useNewUrlParser: true,
        useUnifiedTopology: true,
        useCreateIndex: true
        })
        .then(() =>  console.log('connection succesful'))
        .catch((err) => console.error(err));

    const app = express()
    app.use(express.static('Public'))
    app.set('view engine', 'ejs')
    app.use(express.urlencoded({ extended: true }))
    app.use(cookieParser(process.env.SESSION_SECRET))
    app.use(require("express-session")({
        secret: process.env.SESSION_SECRET,
        resave: false,
        saveUninitialized: false,
        cookie: { maxAge : 4000000 }
    }));
    
passport.use(User.createStrategy());
app.use(passport.initialize());
app.use(passport.session())
passport.serializeUser(User.serializeUser())
passport.deserializeUser(User.deserializeUser())

app.use(connectFlash())

app.use(function (req, res, next) {
    res.locals.user = req.user;
    res.locals.isauth = req.isAuthenticated()
    next();
});

app.use('/',require('./routes/auth'))
app.use('/',require('./routes/routes'))
 
app.listen(process.env.PORT || 5005, function(){
     console.log("listening to port")
 });