Sign into UGC website using the green "sign in by STEAM" button.
Go to your public Team Page, and click on "Join Team"
Follow form instructions for sending a join team request.
Owners accept the new player's Join Request on this Roster page, and you will have an opportunity to set or correct their roster name, and set the players role to "leader" or "member".

Team name is gobus_irl
Password is gobus forever