I'm not sure there is a way to link them, but could be mistaken. If
you're planning to manage your own seller account, you still have to go
through the authentication process and give your own app the necessary
permissions.
Here's a working implementation in python. This does not produce 500
errors: def ebay_callback(): code = request.args.get("code") state =
request.args.get("state") if not code: flash("Authorization failed.",
"error") return redirect(url_for("auth.log...
