use softdelete

app/CheckinWebhook.php

@@ -3,10 +3,13 @@
 namespace App;
 
 use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\SoftDeletes;
 use Illuminate\Support\Str;
 
 class CheckinWebhook extends Model
 {
+    use SoftDeletes;
+
     /** @var int ユーザーごとの作成数制限 */
     const PER_USER_LIMIT = 10;