Worked on the yuwata/systemd repository to enhance the user experience of security token authentication by refining how prompts are presented during physical token workflows. Implemented a targeted change in C that reclassified authentication prompts as informational messages using PAM_TEXT_INFO, aligning with established Linux authentication practices and clarifying user actions without altering underlying security behavior. Focused on authentication, security, and system programming, the update improved user guidance with minimal code modifications, reducing maintenance risk. This work demonstrated a careful approach to UX improvements in PAM-based authentication flows, ensuring that messaging semantics support both usability and robust security standards in system environments.