So i made this script and i put it in the ServerScriptService so the players allowed can get in and the other will be kicked out.

local PlayersAllowed = {"mastercheeseit","Player"}

game.Players.PlayerAdded:Connect(function(player)
	for i,v in pairs(PlayersAllowed) do
		if player.Name == v  then
			print("Allowed To Enter!")
		else
			player:Kick("Not Allowed!")
		end
end
end)