fix post crud

app/services/UserService.php

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