This shows how this is expected to work. You can find the guide here.

If you like to start it go to Cloud Formation in AWS and upload the cloudformation template within the terraform folder. The rest should work. Its done, when the Elastic Cluster, of the Elastic Cloud account that provided the API key is fully working.

As you can see in the picture this process is creating quite a lot of different resources. In order to clean up the AWS environment you can find a cleanup script in the misc folder. Just enter the region you like to clean up and run.