Hello, I am trying to use the eBay seller REST API, and after reading and re-reading their documentation, I am at lost here... I have generated an User Token the following way:
https://i.imgur.com/0fNSLko.png But then if I try to use it in the REST API, for eg., to add a product as a seller, I get this error:
https://i.imgur.com/8oOM9ks.png What am I doing wrong? I have run out of ideas. My app does not have a user interface (so I can't use the user redirect request) thus, I need to give it a token that does not expire in just a few minutes/hours... What can I do?