Implementing OAuth2 client credential flow (WIP)

CloudObjects/SDK/WebAPI/Exceptions/OAuthFlowException.php

@@ -0,0 +1,14 @@
+<?php
+
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+ 
+namespace CloudObjects\SDK\WebAPI\OAuthFlowException;
+
+/**
+ * An Exception that is thrown when an an OAuth flow failed.
+ */
+class OAuthFlowException extends \Exception {
+
+}