ng:areq fn is not a function got objectService angularjs es6 - angularjs

Question

I have 1 service which extends other. When I try to import it in controller got this error ng:areq fn is not a function got UserRepository. I think my problem is in right way injecting this service. Here is my Service:
import { USER_REPO_CONFIG } from '../repository.config';
import { AbstractRepository } from '../abstract.repository';
import { UserModel } from './user.model';
import 'rxjs/add/operator/map';
class UserRepository extends AbstractRepository {
constructor($http) {
'NgInject'
super($http, USER_REPO_CONFIG, UserModel);
}
/**
* Gets the user by ID
*
* #param {number} userId - ID of a user to find
* #returns {Observable<UserModel>} - User model instance
*/
getUser(userId) {
return this.getItem(userId);
}
/**
* Creates the user
*
* #param {UserModel} user - User model instance
* #returns {Observable<UserModel>} - User model instance observable
*/
createUser(user) {
return this.createItem(user);
}
/**
* Updates the user
*
* #param {number} userId - ID of a user to update
* #param {UserModel} user - User model instance
* #returns {Observable<UserModel>} - User model instance observable
*/
updateUser(userId, user) {
return this.updateItem(userId, user);
}
}
export { UserRepository };
here is my Module:
import { HelloComponent } from './hello/hello.component';
import { UserRepository } from '../core/repository/user/user.repository';
const greetingModule = angular
.module('app.greeting',[])
.component('helloComponent', new HelloComponent)
.service('UserRepository', new UserRepository)
.name;
export { greetingModule };
and my Controller:
import { UserRepository } from '../../core/repository/user/user.repository';
class HelloController {
constructor(UserRepository) {
this.hello = 'Hello World';
this.service = UserRepository;
}
getAll() {
console.log('user Repository', this.service)
}
}
HelloController.$inject = ['UserRepository'];
export { HelloController };

Answer 1

.service('UserRepository', new UserRepository)
.service() expects a function, you pass an object. You can pass the class directly:
.service('UserRepository', UserRepository)
Passing the class effectively passes the constructor function.