Hi Anthony,
We looked into this some more, and the issue turns out to be that the Google account is viewing data for multiple Customer IDs in the UI, but when we try to access this data via the API, data for one of the Customer IDs isn't returned. When we try to access the data for this Customer ID, we get the following error:
HTTP code: 400
AuthorizationError.USER_PERMISSION_DENIED
Is there something we need to do to grant this Google account API access to an additional Customer ID?
Thanks,
Amir