How to send sms using AWS SNS service in javascript

sms_sender.js

'use strict';
const AWS = require('aws-sdk');

AWS.config.update({
    secretAccessKey: process.env.secretAccessKey,
    accessKeyId: process.env.accessKeyId,
    region: process.env.region
}); 

const sendSms = function (event, context, callback) {
    try {
        const requestBody = JSON.parse(event.body);
        const phone_number = requestBody.phone_number;

        const params = {
            Message: `Your OTP code for Social Savings app is ${code}`,
            PhoneNumber: phone_number,
            MessageAttributes: {
                'AWS.SNS.SMS.SenderID': {
                    'DataType': 'String',
                    'StringValue': 'Aura'
                },
                'AWS.SNS.SMS.SMSType': {
                    'DataType': 'String',
                    'StringValue': 'Transactional'
                }
            }
        };

        if (typeof phone_number !== 'string') {
            console.error('phone number validation failed');
            callback(null, {
                statusCode: 406,
                headers: {
                    "Access-Control-Allow-Origin": "*",
                    "Access-Control-Allow-Methods": "POST, OPTIONS",
                },
                body: JSON.stringify({
                    status: false,
                    message: 'Couldn\'t proceed because of phone number is not valid.'
                })
            });
        }

         const publishTextPromise = new AWS.SNS({
                            apiVersion: '2010-03-31'
                        }).publish(params).promise();

                        publishTextPromise.then(data => {
                            console.log(data, 'data');
                            if (data) {
                                callback(null, {
                                    statusCode: 200,
                                    headers: {
                                        'Access-Control-Allow-Origin': '*',
                                        'Access-Control-Allow-Methods': 'POST, OPTIONS',
                                    },
                                    body: JSON.stringify({
                                        status: true,
                                        message: `Successfully sent an SMS to ${phone_number}`,
                                    }),
                                })
                            } else {
                                callback(null, {
                                    statusCode: 406,
                                    headers: {
                                        'Access-Control-Allow-Origin': '*',
                                        'Access-Control-Allow-Methods': 'POST, OPTIONS',
                                    },
                                    body: JSON.stringify({
                                        status: false,
                                        message: 'Could send sms'
                                    }),
                                })

                            }
                        })

    } catch (error) {
        console.log(error, 'error');
        callback(null, {
            statusCode: 500,
            headers: {
                'Access-Control-Allow-Origin': '*',
                'Access-Control-Allow-Methods': 'POST, OPTIONS',
            },
            body: JSON.stringify({
                status: false,
                message: error
            }),
        })
    }
}


module.exports = {
    sendSms
}

//if you are using serverless, you can set your environment variables like this

// # you can define service wide environment variables here
//   environment:
//     SECRET_ACCESS_KEY: ${file(./secrets.json):SECRET_ACCESS_KEY}
//     ACCESS_KEY_ID: ${file(./secrets.json):ACCESS_KEY_ID}
//     REGION: us-east-1

if you are using serverless, you can set your environment variables like this

# you can define service wide environment variables here
   environment:
     SECRET_ACCESS_KEY: ${file(./secrets.json):SECRET_ACCESS_KEY}
     ACCESS_KEY_ID: ${file(./secrets.json):ACCESS_KEY_ID}
     REGION: us-east-1