//Kontroler
import { UserService } ...

class UserController {
 private _userService: UserService = new UserService;

 public create = (req, res) => {
    //wywołąnie metody this._userService.createAccount(req.body) i zwrócenie jakiegoś response itp...
 }

//Serwis
import { UserRepository } from ...
export class UserService {
 private _userRepository: UserRepository = new UserRepository;

 public createAccount = (user) => {
  this._userRepository.create(user);
 }
}


//repo
export class UserRepository {
 public create(user) {
    // zapis do bazy danych
 }
}