The March developer build of Couchbase Server 5.0 introduces significant updates to Role Based Access Control (RBAC), emphasizing improved authentication and authorization processes. The updates include the introduction of first-class user features, allowing more granular control over user permissions. Users can now be assigned specific roles, such as Full Text Search (FTS) Admin or FTS Searcher, with permissions tailored to their roles, exemplified by the ability to create or execute searches within designated buckets. While the new features are promising, users are encouraged to provide feedback as some elements remain in development, and bugs are expected. The post provides a detailed look at using the REST API for managing these roles, given current UI limitations, and highlights the importance of these advancements for enhancing security and flexibility in user management.