What projects can I build around login during an MCA?

A strong MCA project should solve a clear problem and demonstrate real technical work. A student can strengthen it with proper documentation, testing, source control and a working demonstration. This makes login more valuable when it is supported by hands-on practice and a clear explanation of what you built. This point is specifically relevant to the login aspect of MCA study. For this specific question about login, the practical takeaway is to relate the concept to your own MCA learning goal.