Elevate your web security expertise with this all-in-one guide: master building robust authentication systems using React.js, Next.js, TypeScript, and MongoDB. From beginner foundations to pro-level implementations, create secure features like user registration, login, password reset, email verification, social logins with Google and Facebook, protected routes, and role-based access. Dive into hands-on tutorials covering API routes, JWT sessions, 2FA, rate limiting, and deployment on Vercel. Sidestep common pitfalls with troubleshooting tips, performance optimizations, and best practices against XSS and CSRF. Launch production-ready apps that safeguard user data and boost your development career today