The command can only be executed by users with certain 'usernames'.
(Type: String || Flag: Emptiable): The names of the users that can execute this command. Use semicolons
;as a separator to separate multiple usernames.
(Type: String || Flag: Emptiable): The message that is returned when the command is used by a non-whitelisted user.
$nomention $onlyForUsers[Nicky;❌ Only users with the username `Nicky` can execute this command!] $c[Put your code here.]