Run weston as custom user and non-root

Hi All,

I'm trying to run weston as a custom user(non-weston user) and non-root 
on arm64 using scarthgap, I can modify 
/etc/systemd/system/graphical.target.wants/weston.service with username 
User=root, Group=video and then run as root user which works OOB, but 
end goal to run weston as custom user which belongs to video group.

Any help is appreciated.

Thanks,
Sandeep