app.js

var createError = require('http-errors');
var express = require('express');
var path = require('path');
var cookieParser = require('cookie-parser');
var logger = require('morgan');
const mongoose = require("mongoose");
const passport = require("passport")
const session = require('express-session');
const dbUrl = "mongodb+srv://testUser:jMbe6l1aYOFlYN3z@cluster0.tn0kznx.mongodb.net/?retryWrites=true&w=majority"

mongoose.connect(dbUrl)
  .then((result) => {
    console.log("Connected Successfully...")
  }) .catch((error) => {
    console.log("Failed to connect to the database: ")
  });

var app = express();
app.use(session({
  secret: 'your-secret-key',
  resave: false,
  saveUninitialized: false,
  cookie: { secure: false, maxAge: 24 * 60 * 60 * 1000 }
}));

app.use(passport.initialize());
app.use(passport.session());
require("./passport-config");

const flash = require("connect-flash");
app.use(flash());

var indexRouter = require('./routes/index');
var usersRouter = require('./routes/users');

// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'ejs');

app.use(logger('dev'));
app.use(express.json());
app.use(express.urlencoded({ extended: false }));
app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'public')));

app.use('/', indexRouter);
app.use('/users', usersRouter);

// catch 404 and forward to error handler
app.use(function(req, res, next) {
  res.redirect("404")
});

// error handler
app.use(function(err, req, res, next) {
  // set locals, only providing error in development
  res.locals.message = err.message;
  res.locals.error = req.app.get('env') === 'development' ? err : {};

  // render the error page
  res.status(err.status || 500);
  res.render('error');
});

module.exports = app;