They do show up, but you have to scroll for quite a long time through different sections. The invite code is for when you start a game through your Soulmask game via "Solo/Friends".
When you accessed the panel via gm key "password" did you then type the password at the bottom of the panel and click "Become the Admin"? My changes weren't working till I did that. Hope this helps you!
With update 2 we're now supposed to have access to set up different passwords to control which permissions people have access to. When are we going to get support for this? When I log in my server it says I have access to everything but kicking users.