Completely remove ability to create users?
Okay, so the code above does work, but not for super admins, you must explicitly remove permissions from super admins, like this: // restrict super admin capabilites add_filter(‘map_meta_cap’, ‘restrict_super_admins’, 10, 4); function restrict_super_admins($caps, $cap, $user_id, $args){ $super = array( ‘add_users’, ‘create_users’, ); if( in_array($cap, $super) ) { $caps[] = ‘do_not_allow’; } return $caps; }