public function __construct()
{
parent::__construct('stats', 'log');
$this->addOption('f|from:', 'from date in YYYYMMDD or YYYY-MM-DD format (default is 30 days backwards)', '-30 days');
$this->addOption('t|to:', 'to date in YYYYMMDD or YYYY-MM-DD format (default is today)');
$this->addOption('p|period:', 'period of time in minutes', 5);
}