Restricting a job to a steam id (Darkrp)

Does anyone know how to restrict a certain job to a steam id im trying to figure this out please help me!

AddEntity("Money Printer", {
    ent = "money_printer",
    model = "models/props_c17/consolebox01a.mdl",
    price = 1000,
    max = 1,
    cmd = "/buymoneyprinter",
    customCheck = function(ply) return ply:SteamID() == "STEAM_0:0:123456" end,
    CustomCheckFailMsg = "You are not allowed to be this job.";