https://authzed.com/learn/google-zanzibar
An Introduction to Google Zanzibar and Relationship-Based Authorization Control
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https://www.heroku.com/blog/applink-now-uses-jwt-based-authorization-salesforce/
Heroku AppLink Now Uses JWT-Based Authorization for Salesforce
Dec 11, 2025 - Heroku AppLink now supports JWT authorization. Replace manual OAuth flows with secure, machine-to-machine authentication.
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