Worked on the trinodb/trino repository to enhance authentication architecture for AWS S3 integration, focusing on backend development with Java. Developed and introduced the s3.auth-type property, enabling flexible authentication modes including anonymous, IAM role, and web identity access. This approach replaced the previous web identity token configuration, streamlining identity management and aligning with modern authentication flows. The update enforced explicit configuration when using IAM roles, ensuring predictable behavior while maintaining backward compatibility for existing deployments. Collaborated closely with other contributors through code reviews, and documented migration paths for users, delivering a substantial upgrade to authentication flexibility and security without addressing separate bug fixes.