The whitelist can be enabled in console or in-game (if you are an operator). To enable the whitelist use the command '/whitelist on' and to disable the whitelist use the command '/whitelist off'. You can add players to the whitelist by using the command '/whitelist add (username)' and you can remove players from the whitelist by using the command '/whitelist remove (username)'.
Replace (username) with the actual player's username.
If you are issuing these commands in console, do not include the leading / before the command.
Updated on: 08 / 19 / 2020