Constructor injection does not work with Laravel - php

Question

I got the error below when I tried to use constructor injection in LoginController.php
Illuminate\Contracts\Container\BindingResolutionException
Target class [Domain\User\UserService] does not exist.
Any idea why?
Following are details.
LoginController.php
class LoginController extends Controller
{
use AuthenticatesUsers;
private $userService;
/**
* Where to redirect users after login.
*
* #var string
*/
protected $redirectTo = RouteServiceProvider::HOME;
public function __construct(UserService $userService)
{
$this->userService = $userService;
$this->middleware('guest')->except('logout');
}
UserService.php
namespace Domain\User;
class UserService
{
private $userRepository;
public function __construct(IUserRepository $userRepository)
{
$this->userRepository = $userRepository;
}
}
UserRepository.php
class UserRepository implements IUserRepository
{
private $user;
public function __construct(User $user)
{
$this->user = $user;
}
UserRepositoryServiceProvider.php
public function register()
{
$this->app->bind(
IUserRepository::class,
function ($app) {
return new UserRepository($app->make(User::class));
}
);
}
UserServiceProvider.php
public function register()
{
$this->app->bind(
'UserService',
UserService::class
);
}