During September 2025, Dan Zhao enhanced the authentication experience for the aau-giraf/foodplanner repository by building a robust login flow using Flutter and Dart. Dan focused on front end and mobile development, implementing explicit input validation to prompt users when email or password fields were missing and providing clearer error messages for failed authentication attempts. The work included refining the duration and visibility of login messages to reduce user confusion and laying the groundwork for future internationalization by incorporating Danish messaging cues. This targeted feature improved the sign-in user experience and established a scalable, secure foundation for authentication workflows.