Question How to make trade offers but items from a user

[.Coder]

Hi, so I want to make a bot that will send trade offers with specific items already selected on my website to a user. So the bot will ask for that user items bot will not give any from own inventory.

 

I guess I have to do something with this code but I have not idea what.

var offer = manager.createOffer("https://steamcommunity.com/tradeoffer/new/?partner=157268861&token=N_0bQbD4");
offer.addMyItems(inventory);
offer.setMessage("Here, have some items!");
offer.send(function(err, status) {
	if (err) {
		console.log(err);
		return;
	}

	if (status == 'pending') {
		// We need to confirm it
		console.log(`Offer #${offer.id} sent, but requires confirmation`);
		community.acceptConfirmationForObject("identitySecret", offer.id, function(err) {
		if (err) {
			console.log(err);
		} else {
			console.log("Offer confirmed");
		}
	});
	} else {
		console.log(`Offer #${offer.id} sent successfully`);
	}
});

So this code, send items from "our" / bot inventory, but I need to send a trade offer with items from a specific user from steam and then he has to accept it.

[Vanilla]

Get list user inventory using manager.getUserInventoryContents and use offer.addTheirItems