public static function runBackups($disk = null)
    {
        try {
            $backupJob = BackupJobFactory::createFromArray(config('laravel-backup'));

            if ( ! is_null($disk)) {
                $backupJob->onlyBackupTo($disk);
            }

            $backupJob->run();
        }
        catch (\Exception $ex) {
            return false;
        }

        return true;
    }