Alternative admin group list, or perhaps testing access directly instead

[moll]

Hey,

It took me a few moments to realize why exactly Firmware Manager kept showing it's only for administrators. I first traced it down to https://github.com/pop-os/system76-firmware/blob/2a64993c8d7fc10f170f3707846b0221c4313f8a/data/system76-firmware-daemon.conf listing two groups as permitted parties. As I had configured sudo to use a different group than %sudo, I thought adding it to /etc/dbus-1/system.d/system76-firmware-daemon.conf would suffice. Turns out, however, that the permitted group list is also hardcoded into https://github.com/pop-os/firmware-manager/blob/df334aeb2b5e6b9df719ab1f2dddcdb08cdf475e/src/users.rs.

Wouldn't it be more robust to just try passing a DBUS message to FirmwareDaemon and seeing it that works, rather than assuming access based on the group?

Thanks!