public RentItService(Helper helper, JsonSerializer json, CoreConverter converter)
        {
            _h = helper;
              _j = json;
              _c = converter;

              _auth = new AuthenticationController(_h, _j, _c);
              _account = new AccountController(_h, _j, _c);
              _product = new ProductController(_h, _j, _c);
              _provider = new ProviderController(_h, _j, _c, _product);
              _credits = new CreditsController(_h, _j, _c);
        }
 public RentItService(Helper h)
     : this(h, new JsonSerializer(h), new CoreConverter(h))
 {
 }