controller.php

<?php defined('SYSPATH') or die('No direct script access.');
/**
 *
 *
 * @package    MIP Website
 * @category   Controller
 * @author     Managed I.T.
 * @copyright  (c) 2011 Managed I.T.
 */
class Controller_Test extends Controller {

	public function action_index()
	{
		$user_id = 1;

		$client = OAuth2_Consumer::factory('mip', $user_id);

		try
		{
			$request = Request::factory('http://wk01-lmst.managedit.ie/mip-api/api/roles');

			$response = $client->execute($request);

			echo Debug::vars($response);
		}
		catch (OAuth2_Exception_InvalidGrant $e)
		{
			/**
			 * This means the request failed due to bad credentials.
			 */
		}
		catch (OAuth2_Exception_InvalidToken $e)
		{
			/**
			 * This means we dont have a token, we need to get one before we can retry.
			 */
			$client->request_token($user_id, array(
				'username' => 'kiall',
				'password' => 'password',
			));
		}
	}
}