The best vip system functions [ vip for account! ]

  function getAccountVipTime(accountName)
  local result = db.getResult("SELECT `viptime` FROM `accounts` WHERE `name` = '" .. accountName .. "' LIMIT 1;")
   if(result:getID() ~= -1) then
     if(result:getDataInt("viptime") > os.time())then
      return result:getDataInt("viptime")-os.time()
     else
      return 0
     end
   else
    return FALSE
   end
   result:free()
 end
 
 function isVip(accountName)
  if(getAccountVipTime(accountName) > 0 or getConfigInfo("freeVip") == "yes")then
   return TRUE
  else
   return FALSE
  end
 end
 
 function doAccountAddVipTime(accountName, vipTime)
  local result = db.getResult("SELECT `viptime` FROM `accounts` WHERE `name` = '" .. accountName .. "' LIMIT 1;")
   if(result:getID() ~= -1) then
    if(result:getDataInt("viptime") > os.time())then
     timeToAdd = result:getDataInt("viptime")+vipTime
    else
     timeToAdd = os.time()+vipTime
    end
    db.executeQuery("UPDATE `accounts` SET `viptime` = " .. timeToAdd .. " WHERE `name`='" .. accountName .. "' LIMIT 1;")
    result:free()
   return TRUE
   end
 end

function onSay(cid, words, param)

	 if(words == "/vip")then
		accountName = getPlayerAccount(cid)
		if(isVip(accountName))then
			time = getAccountVipTime(accountName)
			if(time > 0)then
				doPlayerSendTextMessage(cid, 19, "Your account have "..timeString(time).." of vip time left.")
			else
				doPlayerSendTextMessage(cid, 19, "Your account gratis vip time.")
			end
		else
			doPlayerSendTextMessage(cid, 19, "You haven't any vip time.")
		end
	elseif(words == "/addvip")then
		if(param ~= "")then
		local params = list({"name", "days"}, string.explode(param, ',', 2))
		local player = getPlayerByName(params["name"])
			if(isPlayer(player) == TRUE)then
				if(isNumber(params["days"]))then
					local days = (params["days"]*3600*24)
					doAccountAddVipTime(getPlayerAccount(player), days)
				else
					doPlayerSendCancel(cid, "Days ammount must be in numeric format.")
				end
			else
				doPlayerSendCancel(cid, "Player is not online.")
			end
		else
			doPlayerSendCancel(cid, "Command requires param.")
		end
	end
	return TRUE
end

<talkaction log="yes" words="/addvip" access="5" event="script" value="vip.lua"/>
<talkaction log="yes" words="/vip" access="0" event="script" value="vip.lua"/>

freeVip = "no" -- gratis vip for all? :D

ALTER TABLE `accounts` ADD `viptime` BIGINT( 20 ) NOT NULL ;

Lua Script Error: [TalkAction Interface]
data/talkactions/scripts/vip.lua:onSay

data/lib/function.lua:782: attempt to get length of local 'values' (a nil value)

stack traceback:
        data/lib/function.lua:782: in function 'list'
        data/talkactions/scripts/vip.lua:16: in function <data/talkactions/scrip
ts/vip.lua:1>