Sxmo: ssh user isn't useful without additional groups

Hi,

I just recently installed sxmo using the prebuilt images from: https://images.postmarketos.org/bpo/v21.03/pine64-pinephone/sxmo/20210331-2314/

I installed using the installer image and setup an ssh user called anjan.

When I logged in, screenlock, audio, and camera did not work.

This was fixed by adding the user anjan to the audio,video,input groups. It is ideal if users are added to these groups by default by the installer.