Selling tf2 items with api key using "bot trade".

Hello flippers. I know that this has been discussed already but I noticed that no one really answers to this question but I might be lucky and get some help. In the past I succesfully managed to use Gameflip Api in order to post rocket league items, but now I want to use api key for selling tf2 items and my biggest problem is that I don’t know what to change in the code line so that the delivery method it’s ,Bot trade, and not coordinated transfer. If someone can help me I would be really greatful.
Edit1: I spent like 5 hours and I ve managed to edit bulklisting and put everything in order but I get some errors when I try to node it. Anyone help pls