Hi Sahar,

Thanks for reading the blog and reaching out with questions. The content of this blog is a bit outdated, so I would recommend you to follow this blog written by me:

https://aws.amazon.com/blogs/compute/caching-data-and-configuration-settings-with-aws-lambda-extensions/

This extension is much more secure, faster and already opened inside official github repository. Let me know if you have any further questions. Thanks