Setting authorization levels using Rest Server extension for CodeIgniter

I'm using the Rest Server (https://github.com/philsturgeon/codeigniter-restserver) extension for Code开发者_如何学GoIgniter and I'm struggling to find examples on how to set the authorization level within a method.

I've tried all of the following:

public function index_get()
{
    $this->methods['index']['level'] = 10;
    $this->methods['level'] = 10;
    $this->rest->level = 10;
    $this->level = 10;
}

With no luck. Examples appreciated. Thanks!

---

The following protected method needs to go at the top of the API controller. Here you can specify the authorization level for each method and the rate limit.

   protected $methods = array(
           'index_get' => array('level' => 10),
           'types_get' => array('level' => 10, 'limit' => 20),
   );