express-validator error -> TypeError: req.checkBody is not a function - node.js

Question

I am using express-validator package to validate requested data.
According to these answer I also did change the order or package declaration and initialization
below is my server.js file
const express = require("express");
const session = require("express-session");
const mongoose = require('mongoose');
const MongoStore = require('connect-mongo')(session);
const path = require('path');
const cookieParser = require("cookie-parser");
const bodyParser = require("body-parser");
const passport = require('passport');
const promisify = require('es6-promisify');
const expressValidator = require('express-validator');
const expressJwt = require("express-jwt");
const error_staus = 404;
const morgan = require('morgan');
const logger = require('./helper/logger');
const routes = require('./routes/index');
let server = "";
const bugsnag = require('bugsnag');
// import our configurations from config/tester.js file
const config = require("./config/tester").get(process.env.NODE_ENV);
require('./helper/passport');
require("./helper/translator");
// create our Express app
const app = express();
// view engine setup
app.set("views", `${__dirname}/views`);
app.set("view engine", "ejs");
// serves up static files from the public folder. Anything in app/ will just be served up as the file it is
app.use(express.static(path.join(__dirname, 'app')));
// Takes the raw requests and turns them into usable properties on req.body
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: true }));
// Exposes a bunch of methods for validating data. Used heavily on userController.validateRegister
app.use(expressValidator());
// Sessions allow us to store data on visitors from request to request
app.use(session({
secret: '123456',
key: '99785',
resave: false,
saveUninitialized: false,
store: new MongoStore({ mongooseConnection: mongoose.connection })
}));
app.use(session({
"secret": 'secret12345',
"resave": false,
"saveUninitialized": true
}));
// Passport JS is what we use to handle our logins
app.use(passport.initialize());
app.use(passport.session());
// promisify some callback based APIs
app.use((req, res, next) => {
req.login = promisify(req.login, req);
next();
});
// begin logger
app.use(morgan('dev', {
skip: function (req, res) {
return res.statusCode < 400
}, stream: process.stderr
}));
app.use(morgan('dev', {
skip: function (req, res) {
return res.statusCode >= 400
}, stream: process.stdout
}));
app.use('/', routes);
app.use(function(req, res, next){
logger.error('404 page requested');
res.sendStatus(error_staus);
});
// done! we export it so we can start the site in start.js
module.exports = app;
This is the userController.js
const mongoose = require('mongoose');
const User = mongoose.model('User');
const promisify = require('es6-promisify');
exports.loginForm = (req, res) => {
res.render('login', { title: 'Login' });
};
exports.registerForm = (req, res) => {
res.render('register', { title: 'Register' });
};
exports.validateRegister = (req, res, next) => {
req.sanitizeBody('name');
req.checkBody('name', 'You must supply a name!').notEmpty();
req.checkBody('email', 'That Email is not valid!').isEmail();
req.sanitizeBody('email').normalizeEmail({
gmail_remove_dots: false,
remove_extension: false,
gmail_remove_subaddress: false
});
req.checkBody('password', 'Password Cannot be Blank!').notEmpty();
req.checkBody('password-confirm', 'Confirmed Password cannot be blank!').notEmpty();
req.checkBody('password-confirm', 'Oops! Your passwords do not match').equals(req.body.password);
const errors = req.validationErrors();
if (errors) {
req.flash('error', errors.map(err => err.msg));
res.render('register', { title: 'Register', body: req.body, flashes: req.flash() });
return; // stop the fn from running
}
next(); // there were no errors!
};
Note : I am using express-validator version 3.1.2
When I check request object, in that object there is all methods of express-validator too.
But try to use that method I am getting req.checkBody is not a function error.
Can anybody help with these issue ?