What is a steam account token (GSLT)?
GSLTs is a string of text which CSGO servers require upon booting to make them appear as a public server.
Creating your token.
Navigate to https://steamcommunity.com/dev/managegameservers
Create the token. See the screenshot for an example.
Adding your token to the server.
Login to the Game Panel
Navigate to Game Services
(If you have multiple servers...
What is a Steam Game Server Login Token (GSLT)?
It's a token (like a password) used to authenticate your server with Steam.
Creating your token
Navigate to https://steamcommunity.com/dev/managegameservers
Create the token and fill out the App ID of the game your server is running.
Garry's Mod = 4000
CSGO = 730
TF2 = 440
Adding your token to the server
Login to the Game Panel
Navigate to Game...