getTradeURL(callback) {
		return StdLib.Promises.timeoutCallbackPromise(10000, null, callback, (resolve, reject) => {
			this._sendUnified('Econ.GetTradeOfferAccessToken#1', {}, (body) => {
				resolve({
					token: body.trade_offer_access_token,
					url: 'https://steamcommunity.com/tradeoffer/new/?partner=' + this.steamID.accountid + '&token=' + body.trade_offer_access_token
				});
			});
		});
	}
Gets your account's trade URL.
@param {function} [callback]
@returns {Promise}