Classic Authentication using JWT tokens

Implement classic authentication using JWT tokens.
- Complete the implementation of login page.
- Create a signup page with username (email / phone), name and password.
- Make sure there is a confirmPassword field.
- Use NextJS forms.
- Create a server action which creates a user (make sure password is hashed) on signup and adds a record to database, you can use MongoDB Atlas for this.
- For login, check the password hash and return a token as a JSON response to the frontend.
- Create a page called Dashboard and make it a protected route, it should check the token validity and expiry and show the page only if the token is valid, else it should redirect to the login page.