API Authorization issue
We have many LightSpeed customers and have successfully connected via your API to their accounts except for this one. City Liquors in Boston is the only one that doesn't work. I am able to get them to OAuth and successfully convert the code into an access_token and refresh_token. But when I request Item, Sale and SaleLine I get a 403 response: Not Authorized: Insufficient rights to perform the request. I have never had this problem before. How can I resolve this?