Adding a custom RCON/console command or checking if user is RCON logged in (as the Admin)?

Hello all.

I’m attempting a little mod but only want the Admin(s) to be able to use the mod.
How would I go about making a blueprint that only executes its functions if the user is logged in as the Admin (via the rcon/console)?

Any other methods of keeping the mod secure are welcome. I’ve been digging through Google to see if I can make a password prompt via
a GUI/HUD element and also considered storing a list of approved Steam 64bit ID’s in an external .txt or .ini file that the Admins can add to
as needed.

I’m in the process of waiting for the development tools to download so I’m doing a lot of reading/YouTube’ing whilst I wait.

Thanks for any help.