Google Adsense Site Authentication

[Xphusion]

"
What is site authentication?

The Site Diagnostics page within your account provides details about site authentication--whether our crawler was able to access your site in order to provide relevant ads. Some pages, such as pages behind a login, provide restricted access and do not allow our crawler to crawl them in order to determine their content. Using the site authentication section of your account, you can give our crawler access to specific blocked URLs in order for us to crawl and deliver the most relevant ads."

OK i would like to allow the crawler access to "the inside of my site"

but here is where i stand during setup of this in adsense its ask for a

Restricted Directory or URL: (my url would go here )
Authentication URL <-----What is the exact Login URL?
Authentication method: (post) (Get) (plain HTTP) <--- Which one should i select?

Username and a password (iv created a user "googlebot" and have set a password for the bot to use