# JAAS

> JAAS is an enterprise layer on top of Juju that provides centralized controller management, OIDC authentication, and ReBAC authorization.


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## Pages in this subsection

- [User](https://documentation.ubuntu.com/jaas/latest/reference/user.md): Complete reference for JAAS users including user tags, domain identification, external users, and group and role memberships.

## Optional

- [Top-level llms.txt](https://documentation.ubuntu.com/jaas/latest/llms.txt): Complete documentation index.