Question addMyItem

[xLeeJYx]

var offer = manager.createOffer(steamID)
offer.addMyItem(6081859871, 440, 2, 1)
offer.setMessage("Free Scrap !")
offer.send(function(err, status) {
    if (err) throw err
    console.log(status)
})

This is my code, and below is the error i got, i dont get how its not working :V

C:\Users\JingYong-PC\Desktop\Custom bots or in development\steam\node_modules\steam-tradeoffer-manager\lib\classes\TradeOffer.js:255
                throw new Error("Missing appid, contextid, or assetid parameter");
                ^

Error: Missing appid, contextid, or assetid parameter
    at addItem (C:\Users\JingYong-PC\Desktop\Custom bots or in development\steam\node_modules\steam-tradeoffer-manager\lib\classes\TradeOffer.js:255:9)
    at TradeOffer.addMyItem (C:\Users\JingYong-PC\Desktop\Custom bots or in development\steam\node_modules\steam-tradeoffer-manager\lib\classes\TradeOffer.js:167:9)
    at SteamUser.<anonymous> (C:\Users\JingYong-PC\Desktop\Custom bots or in development\steam\start.js:32:8)
    at emitTwo (events.js:106:13)
    at SteamUser.emit (events.js:191:7)
    at SteamUser._emitIdEvent (C:\Users\JingYong-PC\Desktop\Custom bots or in development\steam\node_modules\steam-user\components\utility.js:29:12)
    at SteamUser._handlers.(anonymous function) (C:\Users\JingYong-PC\Desktop\Custom bots or in development\steam\node_modules\steam-user\components\chat.js:281:9)
    at SteamUser._handleMessage (C:\Users\JingYong-PC\Desktop\Custom bots or in development\steam\node_modules\steam-user\components\messages.js:216:29)
    at emitThree (events.js:116:13)
    at CMClient.emit (events.js:194:7)
Press any key to continue . . .

[Dr. McKay]

addMyItem takes one argument, which should be an object.