add onetime plan

app/Services/UserService.php

@@ -0,0 +1,23 @@
+<?php
+
+namespace App\Services;
+
+use App\Models\User;
+
+class UserService
+{
+    public $user;
+
+    public function __construct(User $user)
+    {
+        $this->user = $user;
+    }
+
+    public function isAvailable()
+    {
+        if ($this->user->transfer_enable && ($this->user->expired_at > time() || $this->user->expired_at == 0)) {
+            return true;
+        }
+        return false;
+    }
+}