Oauth2
Google Cloud Bearer Token Expiry
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https://stackoverflow.com/questions/50370714/google-cloud-bearer-token-expiry
Using OAuth 2.0 for Server to Server Applications | Google Identity | Google Developers
Important: If you are working with Google Cloud Platform, unless you plan to build your own client library, use service accounts and a Cloud Client Library instead of performing authorization explicitly as described in this document. For more information, see Authentication Overview in the Google Cloud Platform documentation.
https://developers.google.com/identity/protocols/oauth2/service-account#python_1
Authenticating as a service account | Authentication | Google Cloud
This topic explains how to authenticate an application as a service account. For general information about authentication to Google Cloud APIs, including common authentication scenarios and strategies, see Authentication overview. For more information about service accounts, see service accounts in the Identity and Access Management documentation.
https://cloud.google.com/docs/authentication/production#providing_credentials_to_your_application
