I am new to node.js programming .I am using nodemailer module for sending emails.

const nodemailer = require ('nodemailer'),

credentials=require('./credentials.js');

var mailTransport=nodemailer.createTransport({

    service:'Gmail',

    auth: {

        user : credentials.gmail.user,

        pass : credentials.gmail.password,

    }

});

function sendMail(mail_id){

    mailTransport.sendMail({

        from: ' my name <[email protected]>',

        to : mail_id,   //[email protected]

        subject : 'Hello',

        text: Hello How do u do ?,

    },function(err,info){

        if(err){

            console.log('Unable to send the mail :'+err.message);

        }

        else{

            console.log('Message response : '+info.response);

        }

    });

}

exports.sendMail=sendMail;

This is my program for sending emails to different users. But I am getting Invalid Login . I don't have any idea why this is coming . I am new to node.js and server side scripting.

I am using my gmail username and password for credentials.

Please help me.