I have a google sheets application that pulls data from ebay using OAuth. I have configured my application and RuName callbacks to point to my google sheet and everything works fine. How do I proceed in providing access for multiple users with their own ebay accounts? Since the callback URLs are unique for each google sheet, I'm unsure how to proceed. Is it possible to send the callback URL along with the OAuth request?
I'm using a callback function url as follows:
https://script.google.com/macros/d/{google sheet id}/usercallback