Feature request: Support user mode for root

[handymenny]

It might be a little weird, but even the root user can have user services.

How about replacing the current error message with a warning?
Or display a popup to choose which user to use (via -M user@)

[welcome]

Thanks for opening your first issue here! 💖

[isd-project]

🧐
I learn something new every day!
Yeah, I guess it makes sense that it is possible.
My local installation doesn't have a user bus for the root user and is the reason why it didn't work for me and why I concluded that this doesn't need to work.

The implementation would be related to #6