Требуется разрешение, предоставленное Google Analytics для созданной учетной записи электронной почты, как указано здесь :
The newly created service account will have an email address that looks similar to:
quickstart@PROJECT-ID.iam.gserviceaccount.com
Use this email address to add a user to the Google analytics view you want to access via the API. For this tutorial only Read & Analyze permissions are needed.