During February 2025, Steffen Boerner developed an ACL-based user access control feature for Redis Sentinel within the bitnami/charts repository. He designed and implemented per-user authentication and configurable access controls by updating Helm chart templates and associated YAML configuration files. This work introduced granular user management for Redis Sentinel deployments, aligning with stricter security and governance requirements in Kubernetes environments. Steffen also provided comprehensive documentation to support adoption and operational clarity. The feature enhanced the security posture of Redis Sentinel charts and established a foundation for future role-based access control and improved auditability, demonstrating depth in DevOps and Kubernetes practices.