feat: make first login event webhook compatible

Signed-off-by: Robin Appelman <robin@icewind.nl>

Author: icewind1991

lib/public/User/Events/UserFirstTimeLoggedInEvent.php

@@ -10,12 +10,13 @@
 namespace OCP\User\Events;
 
 use OCP\EventDispatcher\Event;
+use OCP\EventDispatcher\IWebhookCompatibleEvent;
 use OCP\IUser;
 
 /**
  * @since 28.0.0
  */
-class UserFirstTimeLoggedInEvent extends Event {
+class UserFirstTimeLoggedInEvent extends Event implements IWebhookCompatibleEvent {
 	/**
 	 * @since 28.0.0
 	 */
@@ -31,4 +32,16 @@ public function __construct(
 	public function getUser(): IUser {
 		return $this->user;
 	}
+
+	/**
+	 * @since 34.0.0
+	 */
+	#[\Override]
+	public function getWebhookSerializable(): array {
+		return [
+			'user_id' => $this->user->getUID(),
+			'display_name' => $this->user->getDisplayName(),
+			'email' => $this->user->getEMailAddress(),
+		];
+	}
 }