Add: Custom Authentication template

[GMHarish285]

Create a new template that provides a custom authentication system.

Tasks:

• User registration and login
• Proper way of storing user credentials
• JWT based token generation and verification

Optional:

• Implementing refresh tokens

[GMHarish285]

@Ashrockzzz2003
I would like to take up this issue

[Ashrockzzz2003]

Assigned @GMHarish285

[Ashrockzzz2003]

@GMHarish285
Still interested to work on this?