Added authentication failure events

src/Event/ClientAuthenticationFailedEvent.php

@@ -0,0 +1,51 @@
+<?php
+/**
+ * OAuth 2.0 client authentication failed event
+ *
+ * @package     league/oauth2-server
+ * @author      Alex Bilbie <hello@alexbilbie.com>
+ * @copyright   Copyright (c) Alex Bilbie
+ * @license     http://mit-license.org/
+ * @link        https://github.com/thephpleague/oauth2-server
+ */
+
+namespace League\OAuth2\Server\Event;
+
+use League\Event\AbstractEvent;
+use Symfony\Component\HttpFoundation\Request;
+
+class ClientAuthenticationFailedEvent extends AbstractEvent
+{
+    /**
+     * Request
+     * @var \Symfony\Component\HttpFoundation\Request
+     */
+    private $request;
+
+    /**
+     * Init the event with a request
+     * @param \Symfony\Component\HttpFoundation\Requesty $request
+     */
+    public function __construct(Request $request)
+    {
+        $this->request = $request;
+    }
+
+    /**
+     * The name of the event
+     * @return string
+     */
+    public function getName()
+    {
+        return 'error.auth.client';
+    }
+
+    /**
+     * Return session
+     * @return \Symfony\Component\HttpFoundation\Request
+     */
+    public function getSession()
+    {
+        return $this->request;
+    }
+}