public function getAll($label = null, $page = 1, $perPage = 25)
    {
        $params = array(
            'page' => $page,
            'per_page' => $perPage
        );

        if ($label !== null) {
            $params['label'] = $label;
        }

        return $this->_user->get('account/identity', $params);
    }