What permission is needed to end an Appstream 2.0 session?

Hi

You need appstream:ExpireSession: https://docs.aws.amazon.com/appstream2/latest/APIReference/API_ExpireSession.html

You can use the IAM policy editor to find out.

Here is the JSON

{
	"Version": "2012-10-17",
	"Statement": [
		{
			"Sid": "ExpireSession",
			"Effect": "Allow",
			"Action": "appstream:ExpireSession",
			"Resource": "<...>"
		}
	]
}