I have followed this guide and everything works as long as the default browser is signed into a Google account that is a part of our organization, or if no Google account has ever been signed in. If the user is signed into both their personal Gmail and work Gmail account and the last account they were looking at was their personal account, or they are only signed into their personal account, the error "Authorization Error Error 403: org_internal" is displayed instead of allowing the user to pick the account they want to use. Is there a way to allow the user to select which Google account is used to authenticate to Perforce?

I created this gist which describes installing HAS for a production system. I did this on the same box that is running Swarm and show how to configure a real certificate from Let's Encrypt. I also show how to configuring groups to use HAS and exclude background users like admin, swarm, etc.