Dependency Injection, Decorator's For Controllers/Middleware

[brarsanmol]

Hi folks,

We can discuss the work on dependency injection, and decorators for controller's and middleware here.

December 11th 2021:
The following commit has been created as the first push towards this approach. I won't state the details here as I've left quite a hefty commit description, let me know if there are any questions.

The code pushed in that commit compiles on my machine and all the operations on the Authentication/Account controllers can be performed.