I understand your frustration. Generating a valid access token can
sometimes be a bit tricky. Make sure you follow the authentication
process step by step. You'll need to create an App on eBay Developer
Program, get your credentials, and then exchang...
I've encountered a similar situation before, and I completely understand
the importance of receiving notifications for order cancellations,
refunds, and returns. Utilizing the eBay Trading API as mentioned by the
previous response could be a viable s...
