Hi Dan,
Thank you for posting your concern. Allow me to provide support to your concern.
To answer your question, I would suggest referring to this
document as it explains how to authorize Google Ads API request. Also, the error that you mentioned occurs when you're not specifying the customer ID of the Google Ads Account, where your login user account / email address (that you've used to generate Oauth2 credential) has direct access, to the
login-customer-id. If your login user account / email address has access to the MCC account, then its customer id must be set in the
login-customer-id header.
Furthermore, I would also suggest referring to this
document as it presents details specific to REST and explains what you need to know to call the REST interface directly.
Regards,
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| Ernie John |
| Google Ads API Team |
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