post crud fix

app/services/UserService.php

@@ -34,8 +34,9 @@ class UserService
         return false;
     }
 
-    public function check(int $user_id): bool
+    public static function check(int $user_id): bool
     {
+
         if (User::where(['id' => $user_id])->first())
         {
             return true;