Separated laravel app to its own folder (#540)

api/app/Models/Billing/Subscription.php

@@ -0,0 +1,28 @@
+<?php
+
+namespace App\Models\Billing;
+
+use App\Events\Billing\SubscriptionCreated;
+use App\Events\Billing\SubscriptionUpdated;
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Laravel\Cashier\Subscription as CashierSubscription;
+
+class Subscription extends CashierSubscription
+{
+    use HasFactory;
+
+    protected $dispatchesEvents = [
+        'created' => SubscriptionCreated::class,
+        'updated' => SubscriptionUpdated::class,
+    ];
+
+    public static function booted(): void
+    {
+        static::saved(function (Subscription $sub) {
+            $sub->user->flushCache();
+        });
+        static::deleted(function (Subscription $sub) {
+            $sub->user->flushCache();
+        });
+    }
+}