adding app/library/OAuth/UserData classes (interface and Github implementation)

app/library/OAuth/UserData/UserDataInterface.php

@@ -0,0 +1,43 @@
+<?php
+
+namespace Httpcb\OAuth\UserData;
+
+interface UserDataInterface
+{
+    public function __construct(array $data);
+
+    /**
+     * The providers name.
+     *
+     * @return string
+     */
+    public function getProvider();
+
+    /**
+     * Owners ID (userid)
+     *
+     * @return string
+     */
+    public function getId();
+
+    /**
+     * the username
+     *
+     * @return string
+     */
+    public function getUsername();
+
+    /**
+     * Full name.
+     *
+     * @return string
+     */
+    public function getName();
+
+    /**
+     * Email address
+     *
+     * @return string
+     */
+    public function getEmail();
+}