Not working in AWS Lambda function

[nirvish123]

This below code works in NodeJS Express framework but when I deployed same code in AWS Lambda function it didn't work.
Here's my demo code.

*** BEGIN ***

const SendOtp = require('sendotp');
const objSendOtp = new SendOtp('<API_SECRET>');

objSendOtp.send(, , , function(err, data){
if(err) console.log(err);
else
console.log(data);
});

*** END ***