One significant challenge was integrating a secure authentication system while managing user data and interactions. Implementing JWT-based authentication and handling user sessions effectively required careful attention to security practices and error handling. To address this, I researched best practices for token management and session security, and tested the implementation thoroughly to ensure a robust and secure system.

Another challenge was creating a user-friendly interface with EJS templates and Bootstrap. Ensuring that the pages were responsive and visually appealing required iterative design and testing across different devices. I resolved this by leveraging Bootstrap's grid system and customizing styles as needed.