Rudder

Authorized keys are used for personal and system accounts.
I was suprised to see I can't add them from the user management technique since it's such a nice convenience thing.
If you create an initial user environment it is among the things you provide for them.

• For user accounts they will mostly be used in conjunction with locking password-based login or starting different login environments as per a "ssh forced command"

• For system accounts they might be used for interactive maintenace, or also for triggering certain tasks.

I think it would definitely need to be a "multiinstance" thing, since you could have different sources for keys. On the other hand I can also imagine one would need to wipe out even unknown keys.