Developed a JWT-based user authentication system for the bounswe/bounswe2025group9 repository, focusing on secure and scalable API access. The work involved implementing login functionality that generates JWT tokens upon successful authentication, updating Django API endpoints and views to support token-based sessions, and ensuring robust coverage through comprehensive test cases for various login scenarios. By leveraging Python, Django, and JWT authentication, the solution enhanced security with stateless session management and improved onboarding for mobile and third-party clients. The approach emphasized API development best practices, test-driven development, and attention to security, resulting in a maintainable and extensible backend authentication workflow.