An OPAL policy-store is an interface that enables OPAL to manage policy-engines that can make authorization decisions via OPAL clients.

This issue is a feature request to add OpenFGA as a policy-store in OPAL alongside the existing supported policy stores (OPA and Cedar) so developers can better manage OpenFGA services.

Acceptance criteria:

• Ability to configure OpenFGA as a policy store in OPAL
• OpenFGA models/policies are auto-synced from git
• OpenFGA supports the data fetching pattern and syncing data from external data sources
• A working end-to-end demo with example ReBAC policies and mock data
• Docker-compose examples of running OPAL with single or multiple OpenFGA clients
• 100% UT coverage on the code and at least one integration test