public function store(StoreUserRequest $request)
 {
     $user = new User($request->all());
     if (!empty($user->avatar)) {
         $user->avatar = $this->putAvatar($user->avatar);
     }
     $user->save();
     Flash::success('El usuario ' . $user->name . ' ha sido registrado exitosamente');
     return redirect()->route('admin.users.index');
 }