Username or EmailPassword
Not to digress, but your comment reminded me of the vague Apple and Apollo deal of the late 80s: Apollo porting System 6 GUI (QuickDraw & Finder) to Apollo's Domain/OS -- OS may have still been called AEGIS at the time. In exchange, Apple could sell Apple-branded Apollo workstations running Domain/OS.
Domain/OS was not based on Unix, despite the articles. I'd say it was closer to PRIMOS (also derived from Multics).
I apologize, the above is totally off subject but your comment sparked my interest, and this is an OS site and we are all OS nerds. :-)