Solved :  Class constructor MongoStore cannot be invoked without 'new'

Above screenshot you can see what is the problem , 

Solution :

                    follow this code and fix this problem. this type Error is    showing  because  of we using old way to create session and storing in database .

see this is guide .

        you have to use this for require:

            const MongoStore = require('connect-mongo');

and Now use this as store data and create session :

 // session for save in cart

app.use(

    session({

    secret: process.env.COOKIE_KEY, // database url

    resave:false,

    saveUninitialized:false,

    cookie: {maxAge: 1000*60*60*24}, // 24  hours

    store : MongoStore.create({

        mongoUrl: process.env.dbUrl,

        collectionName: 'sessions'

    })

})

);