Lua Promotion Npc

[The Governor]

On my server first promotion is free, and the second promotion is custom and requires vip. Now i forget how to make it so the npc will only give you the advanced promotion if you have a vip account. Hopefully you guys remember.

Heres the script:

 local keywordHandler = KeywordHandler:new()
local npcHandler = NpcHandler:new(keywordHandler)
NpcSystem.parseParameters(npcHandler)

function onCreatureAppear(cid)			npcHandler:onCreatureAppear(cid)			end
function onCreatureDisappear(cid)		npcHandler:onCreatureDisappear(cid)			end
function onCreatureSay(cid, type, msg)		npcHandler:onCreatureSay(cid, type, msg)		end
function onThink()				npcHandler:onThink()					end

local node2 = keywordHandler:addKeyword({'promot'}, StdModule.say, {npcHandler = npcHandler, onlyFocus = true, text = 'Would you like to buy the advanced promotion for 50000 gold coins.'})
	node2:addChildKeyword({'yes'}, StdModule.promotePlayer, {npcHandler = npcHandler, cost = 50000, level = 30, promotion = 2, text = 'Congratulations! You now have the advanced promotion.'})
	node2:addChildKeyword({'no'}, StdModule.say, {npcHandler = npcHandler, onlyFocus = true, text = 'Alright then, come back when you are ready.', reset = true})

npcHandler:addModule(FocusModule:new())

Thanks. REP++