You'll need to have a environment variable set up in your AWS instance with a name of: GITHUB_TOKEN and it needs to be a token that has access to your repo's.

I made this so that I could push code changes into a staging branch, then have this script run after hours (triggered by an AWS Event) and merge staging into master. From there I have AWS CodePipeline hooked up to deploy the application. Also, I have Cloudwatch Listening for errors on the Lambda Function and will alert if any errors are returned.