Following Code which is I used. var client = new SteamUser();var manager = new TradeOfferManager({ "steam": client, // Polling every 30 seconds is fine since we get notifications from Steam "domain": "example.com", // Our domain is example.com "language": "en", // We want English item descriptions "cancelTime" : 120000 //Cancellation Time in miliseconds 1000 ms = 1 second, After 2 minute cancel trade}); var offer = manager.createOffer(trade_url);offer.data('cancelTime', null); //I written my code to remove cancellation time for this trade but do not work this codeoffer.addMyItems(inv_to_trade); offer.setMessage("My Message here");offer.send(function (err, status) { if (err) { logger.error("trade send Error",err); return true; }}); Question : I written offer.data('cancelTime', null); but this do not work so How I cancel this offer ?