No exit from 2FA prompt

[metafarion]

...or maybe I'm wrong, but it seems like if for whatever reason I don't get the 2FA code from Humble or Steam, and I have nothing to enter... there's no way to exit the program? Even Ctrl+C doesn't save me here.

[metafarion]

....actually, on closer examination it looks like there are a LOT of points in the process where it's very difficult or impossible to gracefully exit the program. Like the main menu.