Add Admin login and signup features

[Codehackerone]

Add admin login and signup service, controller and routes.

[ronitblenz]

Hi, Can I use google/facebook auth to create this? then I can take this issue

Thanks

[Codehackerone]

No, you just have to create the functions. Google, FB not required.

[ronitblenz]

Can you assign plz?

[Codehackerone]

Sure

[ronitblenz]

I have made a PR, Kindly check