Hi Tristan
Thank you for using our Microsoft Advertising Learn Q&A Platform!
The error message Personal Identity Not Available with code 122 indicates that your Microsoft Advertising account is currently set up as a personal account, but the API and integrations (such as connecting to BigQuery) require a work account.
Thank you for confirming that you’ve already tried switching to a work account without success.
In this case, the next step is to have another Super Admin in your Microsoft Advertising account remove you as a user and then send you a new user invitation. When you receive the new invite, make sure to log in using your work account credentials.
Once your account is converted to a work account, retry the authentication process for your Cloud Run function. This should eliminate the error and allow the connection to proceed.
If this still does not resolve the issue, please reply to the private message I sent you so that I can assist you further.
I hope the information provided here will at least partly answer your question. If you have any additional questions please do not hesitate to reach out to our support.
Kind regards,
Arsen D. | Microsoft Advertising Support Specialist | 800-518-5689