public function run()
 {
     $manager = PluginManager::instance();
     if ($manager->exists('shahiemseymor.roles')) {
         if (!\ShahiemSeymor\Roles\Models\UserPermission::where('name', '=', 'calendar_public')->first()) {
             \ShahiemSeymor\Roles\Models\UserPermission::create(['name' => 'calendar_public']);
         }
         if (!\ShahiemSeymor\Roles\Models\UserPermission::where('name', '=', 'calendar_deny_all')->first()) {
             \ShahiemSeymor\Roles\Models\UserPermission::create(['name' => 'calendar_deny_all']);
         }
     }
 }