post crud fix

app/controllers/PostController.php

@@ -30,7 +30,7 @@ class PostController extends Controller
         $postForm = new CreatePostForm();
         $postService = new PostService();
         $postForm->load($_REQUEST);
-        if((new UserService)->check($_REQUEST['user_id'])) {
+        if(UserService::check($_REQUEST['user_id'])) {
             if ($postForm->validate()) {
                 $post = $postService->create($postForm);
                 if ($post) {