A secure MERN stack authentication system with both 1FA (username/password) and 2FA (TOTP) login flows. Built with Passport.js for primary authentication and Speakeasy for time-based OTP verification. Includes a modern React frontend, Node.js backend, and MongoDB for persistent user and 2FA data.
This is a simple application that demonstrates how to implement Two-Factor Authentication (2FA) using Node.js, Express.js, and MongoDB. The application uses the Speakeasy library to generate TOTP (Time-based One-Time Password) tokens and QRCode to generate QR codes.
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