RBAC Authorization with FastAPI and PropelAuth

Role-based access control (RBAC) assigns application permissions according to user roles, illustrated through a team chat product where both Admins and Members can view and send messages but only Admins can access billing information. Using FastAPI and PropelAuth, the example verifies a user’s authentication token, confirms organization membership, and enforces a minimum Admin role before returning protected billing data. PropelAuth initializes verification metadata at application startup, allowing requests to be authenticated locally without external calls, while its B2B authentication features support organization creation, invitations, role management, and configurable sign-up interfaces. On the frontend, libraries can identify logged-in users through secure HTTP-only cookies, retrieve a user’s active organization and short-lived access token, and send that token with organization-specific backend requests. Requests from users who are not members of the specified organization are rejected, and PropelAuth provides managed workflows for invitations, emails, and role changes.

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