Worked on the trinodb/trino repository to enhance authentication reliability by adding User-Agent header support to JWKS HTTP client requests. Focused on backend development using Java, the implementation involved updating the JwkService and related HTTP code paths to propagate the User-Agent header during JWKS fetches. This change addressed compatibility issues with endpoints behind proxies, WAFs, and identity providers that require specific headers for security checks. By improving HTTP client management and adhering to security protocols, the update reduced authentication failures and strengthened the robustness of the authentication flow, ensuring smoother integration with external security services and infrastructure components.