Detach project in command line

Hi Team,

Maybe I will explain a bit better. Is there any controls at the user level to detach all projects and delete it from the database ?

I understand this does not reduce the database and I have to run the compact command as explained earlier here

I have about 10 users who left the lab, but they still have large their projects and Jobs occupying database and hard disk. Whats the best way to go about it ?

Thanks for reading.