Added RingCentral SMS adapter

src/Utopia/Messaging/Adapters/SMS/RingCentral.php

@@ -0,0 +1,57 @@
+<?php
+
+namespace Utopia\Messaging\Adapters\SMS;
+
+use Utopia\Messaging\Adapters\SMS as SMSAdapter;
+use Utopia\Messaging\Messages\SMS;
+
+// Reference Material
+// https://developers.ringcentral.com/sms-api
+
+class RingCentral extends SMSAdapter
+{
+        /**
+     * @param  string  $apiKey RingCentral API Key
+     */
+    private string $apiKey;
+
+    public function __construct(string $apiKey)
+    {
+        $this->apiKey = $apiKey;
+    }
+
+    public function getName(): string
+    {
+    return 'RingCentral';
+    }
+
+    public function getMaxMessagesPerRequest(): int
+    {
+    return 40;
+    }
+
+    protected function process(SMS $message): string
+    {
+        $url = 'https://platform.devtest.ringcentral.com/restapi/v1.0/account/accountId/extension/extensionId/sms';
+
+        $headers = [
+            'Authorization: Bearer ' . $this->apiKey,
+            'Content-Type: application/json',
+        ];
+
+        $data = [
+            'channel' => 'sms',
+            'src' => $message->getFrom(),
+            'dst' => $message->getTo()[0],
+            'text' => $message->getContent(),
+        ];
+
+        return $this->request(
+            method: 'POST',
+            url: $url,
+            headers: $headers,
+            body: json_encode($data),
+        );
+    }
+
+}