The Prometheus 8.0 Beta 1 image I download from the website (https://downloads.puri.sm/live/gnome/2018-07-06/pureos-8.0-gnome-live_20180706-amd64.hybrid.iso) requires a username and password to log in, rather than dropping the user into the desktop session (as expected from a Live DVD/USB image). I'm using the FOSS VirtualBox on Debian to boot the image.
This is an obvious barrier for trying the operating system, and I can't find a default username/password in any documentation online.