@ssirag – That post you shared by Victor from blog.clingest.com did the trick!
I thought since the plugin didn’t require a setup of cloudfront that it would work, but that was not the case for me.
The changes that I made to get it working are:
1. Set up cloudfront distribution
2. Use the form to input the keys and removed them from wp-config.php
3. I set up new user with the custom policy that was defined in the article.
Thanks Brad Touesnard for a cool plugin and for everyone sharing their ideas on how to get it working.