Step 1: Log into our game server control panel.
Step 6: Add the user Steam 64 IDs that you would like to be whitelisted, each ID being on their own line.
Step 7: Users can also be added to the whitelist in-game from the admin menu.
Note: ARK also supports its own "whitelist" mode which acts as a bypass for player join checks (ignores slot checks, etc.). This can be enabled in the same fashion by simply creating a file named "PlayersJoinNoCheckList.txt" in the same location as the exclusive join file.