Stop your game server.
Go to the Game server > Settings page.
Follow the guide to get your SteamID64 How to find your steamid
Put your SteamID64 into the OwnerID field, click Save and restart your game server.
How to add Moderators
To add moderators to your server, open folder /server/my_server_identity/cfg/ via our File manager. Open or create a new file with the following name: users.cfg For each user that you want to assign the owner admin role to, you will need their 64 bit Steam ID. You can use a great service called, SteamID I/O to find the corresponding ID. Simply input the role, 64 bit Steam ID, steam name (optional), reason (optional). Enter the following line, on a separate line, for each player you want to assign the owner admin role: ownerid “64_bit_steam_id” “optional_user_name” “optional_reason” If you want to add a moderator roles, you will follow the same steps above, but instead enter the following role: moderatorid “64_bit_steam_id” “optional_name” “optional_reason” You will then need to restart your game server in order for the changes to take effect.