Express Validation and Session packages for Node.js

//In the terminal, go to your project folder and run the following:

$ npm install --save express-validator

$ npm install --save express-session

//-----------------------------------
//Go to your app.js file, and make sure it reads as follows:
//-----------------------------------

var express = require('express');
...
var expressValidator = require('express-validator'); /*** require Form Validator ***/
var expressSession = require('express-session'); /*** require Session ***/

var routes = require('./routes/index');

var app = express();

...

/* Middlewares */

app.use(logger('dev'));
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: false }));

/*** use Form Validator ***/
app.use(expressValidator()); 

app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'public'))); //load public css,js statically thru import in html code

/*** Use Session management ***/
app.use(expressSession({secret: 'test', saveUninitialized: false, resave: false}));
//resave true saves session after each request even if session not initialized

app.use('/', routes);
app.use('/users', users);