How can I inject a custom class between controller and repository. #4348

Hello Team,

Please help me to inject a class between my controller and repository.
I want create a library/myclass.ts and that i want to call from my controller request function. So that i can interact with my different database table through repository instances.

@fabien @albertoleal @sam-github @rmg @Schoonology
Guys please help to do it. As I am moving from Laravel to Loopback.