FEATURE REQUEST: login and signup routes in the backend

### Is your feature request related to a problem?

- [x] Yes, it is related to a problem

### Describe the feature you'd like

## 🌟 Feature Description
Implement the signup and login routes in the backend.

## 🔍 Problem Statement
Seems like for now we are just routing by default based on state variable and promises. so, I would like to implement the backend auth routes for user signup and login

Please let me know if I can start working on this. and can I use JWT for authentication?

### Record

- [x] I agree to follow this project's Code of Conduct
- [x] I want to work on implementing this feature