🚀 Issue: Create Express-Based Login and Signup Backend

Feature Description:

Develop a user authentication system using Express.js that supports login and signup functionalities. This will serve as the backend for user authentication, handling password hashing and session management.

✅ Requirements:

📌 User Signup API (/api/auth/signup)

• Accepts: name, email, password
• Hashes the password before storing it in the database.
• Returns a success message or an error response.

📌 User Login API (/api/auth/login)

• Accepts: email, password
• Verifies credentials.
• Creates a session or a cookie upon successful login.
• Handles incorrect credentials with appropriate error messages.

📌 Database (MongoDB with Mongoose)

• User Schema:
  • name: String
  • email: String (Unique)
  • password: Hashed String
  • createdAt: Timestamp

📖 Ensure Proper Implementation

• ✅ Use bcrypt.js for password hashing.
• ✅ Use express-session or cookies for session management.
• ✅ Validate input using express-validator.