Add ability to load demo users

[WillStrohl]

Sponsorship

If this request requires additional support (e.g., such as direct email/phone/meeting/development), I have the following interest in helping to sponsor the effort via GitHub Sponsors:

• None, please continue to work for me for free :P
• Absolutely, I get value out of this!
• Maybe later
• I'm already a sponsor... Woot!

Is your feature request related to a problem?

As a power user of DNN, I often do demo videos, testing, and selling of DNN. It would be nice to have a was to quickly add and remove demo users cleanly, without having to waste the time to think them up and add them manually myself.

Describe the solution you'd like

A command to create the demo user accounts, set-demousers.
A command to be sure the created user accounts are cleanly deleted and not in the recycle bin, delete-demousers.

Describe alternatives you've considered

N/A

Additional context

N/A