🚀 MERN Auth Controller (Authentication System)

A full-stack MERN authentication system with secure login, JWT authentication, OTP-based password reset, and email verification. Built with modern UI and deployed on cloud platforms.

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🌐 Live Demo

• 🔗 Frontend: https://auth-controller-fsd.onrender.com
• 🔗 Backend: https://auth-controller.onrender.com

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✨ Features

• 👤 User Registration & Login
• 🔐 JWT Authentication
• 🔒 Protected Routes
• 📩 Forgot Password via Email OTP
• ⏳ OTP Expiry (5 Minutes)
• 🔁 Password Reset Flow
• 🧾 Input Validation (Formik + Yup)
• 🔔 Toast Notifications
• 📱 Responsive UI
• ☁️ Cloud Deployment (Render + MongoDB Atlas)

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🛠️ Tech Stack

Frontend

• React.js
• React Router DOM
• Formik
• Yup
• React Hot Toast
• Bootstrap

Backend

• Node.js
• Express.js
• MongoDB
• Mongoose
• JSON Web Token (JWT)
• Nodemailer
• bcrypt.js

Deployment

• Render (Backend + Frontend)
• MongoDB Atlas

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🔐 Authentication Flow

1. User registers / logs in
2. JWT token is generated
3. Protected routes secured using middleware
4. Forgot password sends OTP to email
5. OTP verification (valid for 5 minutes)
6. User resets password successfully

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📧 Email Service

• OTP emails sent using Nodemailer
• Gmail SMTP with App Password authentication
• Secure and reliable email delivery

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