=== Iyzico 3D Secure Payment Test === 1. Validating payment data... ✓ Payment data is valid 2. Initializing 3D Secure payment... Note: This will fail without valid API credentials Please update your .env file with real Iyzico credentials === Test Complete === Next steps: 1. Copy .env.example to .env 2. Update .env with your Iyzico API credentials 3. Update callback URLs to match your domain 4. Test with the API endpoints