feat: Login Authentication

[CodingPhionix]

Fix-issue: #2 , #1 , #5, #7

Issue #1 :

I implemented a login route using Node.js and Express. The solution involved the following steps:

1. Validation: I validated the request body to ensure it contained the required fields, namely email and password.

2. Authentication: I authenticated the user by checking if the provided email and password matched the credentials stored in the system.

3. JWT Token Generation: Upon successful authentication, I generated a JSON Web Token (JWT) containing the user's information and signed it with a secret key.

4. Response: Finally, I returned the JWT token along with a success message indicating that the user logged in successfully.

This approach ensures secure authentication and enables users to access protected routes using the issued JWT token.

Next I did was Issue #2 :

1. Added user signup route (POST http://localhost:3000/auth/signup) handling.
2. Hashed user password using bcryptjs for security.
3. Saved user details to the database upon successful signup.
4. Returned a success message and user details upon successful signup.
5. This enhancement ensures a secure and seamless signup experience for new users.

Issue #5 :

• Added a controller to fetch all books from the database.
• Used the Book model to retrieve book data from the database.
• Returned the fetched books in the response along with a success message.

Issue #7 :

• Added a controller to handle book deletion by ID.
• Utilized the Book model to find and remove the book from the database.
• Returned a success message upon successful deletion of the book.