Add code snippets for checking an incoming message

Author: SecondeJK

messages/signed-webhooks/verify-webhook.php

@@ -14,5 +14,5 @@
 $client->sms()->send($message);
 
 // Incoming Request
-$signature = new Vonage\Client\Credentials\SignatureSecret(VONAGE_API_KEY, VONAGE_SIGNATURE_SECRET, 'sha256');
+$signature = new Vonage\Client\Signature(VONAGE_API_KEY, VONAGE_SIGNATURE_SECRET, 'sha256');
 $isValid = $signature->check($_GET['sig']);