Imaster wp FAQ user problmes

I need the editors as users to be able to use imaster wp faq . For now only administrators can do that i found some code but i have no luck.

The code is in imasters-wp-faq.php at the bottom of the document

$role = get_role(‘administrator’);
if(!$role->has_cap(‘manage_faq’)) {
$role->add_cap(‘manage_faq’);
}

I have tried some changes but it seems i cant figure it out

PlS helpe me

Cheers