While I know there's the copy-paste method, it's very frustrating to try and click the screen with the controller, and then (without hitting any other buttons on controller) to CTRL+P the password in on only the password field not the username field.
If the login screen was the same for desktop and for headset user (do the dual screen mode like with Stream Camera), it would be tremendously easier to login when the credentials expire.
My alternative right now is to always start up in Desktop mode, check for login expiration, login, restart the game in VR mode, and continue on.
I also don't want to have to memorize my randomized password, nor make it easier to bruteforce.