How can I allow only google crawlers if firewall.bot is enabled and how to test if works fine? Currently my firewall config looks like: ``` 'bot' => array ( 'enabled' => true, 'methods' => array ( 0 => 'all', ), 'routes' => array ( 'only' => array ( ), 'except' => array ( ), ), 'crawlers' => array ( 'allow' => array ( 0 => 'GoogleSites', ), 'block' => array ( ), ), 'auto_block' => array ( 'attempts' => 5, 'frequency' => 1 * 60, 'period' => 30 * 60, ), ), ``` It's fine or I need to change anything?