ShowMyAdminManager does nothing...the command acts like it doesn't exist.. How can i get player id's?

ShowMyAdminManager only works when you're in Admin mode. You'll need to use the following two commands

enablecheats [password] cheat ShowMyAdminManager

You can also use the players tab in your console to see the steam account names. You can then use any number of websites to translate steam account into SteamID64

I figured it out. You can't put 'cheat showmyadminmanager'. You have to just type 'showmyadminmanager'.