For the url: https://sandbox.dev.clover.com/oauth/token?client_id=CGFH0842BXH1W&client_secret=SECRET&code=ac98cbc4-3abd-a732-f07a-e83dd859968
I'm receiving the following error:
{"message": "Invalid length authcode"}
This code is provided back to me with the callback URL that includes the merchant ID etc.