Getting InvalidSignatureException: Forbidden Error When deployed my dockerized Pinpoint Application on EC2.

I have built an app that creates pinpoint endpoints using aws-sdk and it's working perfectly in my local machine and local docker container but when i deployed the same application on EC2 using docker it's giving me this "Forbidden" Error. why? i mean if it's working fine locally it should work live as well.

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

AWS.config.update({
    secretAccessKey: process.env.AWS_SECRET_ACCESS,
    accessKeyId: process.env.AWS_ACCESS_KEY,
    region: 'ap-southeast-2',
  });

const pinpoint = new AWS.Pinpoint();
pinpoint.updateEndpoint(params, function (err, data) {
              if (err) {
                logger.info('An error occurred.\n');
                logger.info(err, err.stack);
              } else {
                logger.info(
                  '>> Endpoint added/pushed Successfully with endpoint ID ' + obj_id
                );
              }
            });