I know a few of you have been asking for user management for shared iPad especially, so.....
If you go to Systems Manager > devices and click on a Mac or shared iPad, you'll now see, towards the bottom of the page, the ability to both reset the password of a user and also the ability to delete a user. This last feature is especially useful for Shared iPad, where multiple resident users will fill an iPad:
Shared iPad
macOS
and
for details of creating users systematically: https://youtu.be/0ioaogmQNcc?feature=shared