[xwiki-users] Authentication with groovy

Hi! I want to retrieve some content from the web site (on the same domain as XWiki) using groovy. I've already got success for not protected site, but when the site requires username/password, then the script fails. So I somehow need to pass already logged in XWiki user credentials. XWiki 1.6, configured LDAP authentication for AD. Here's the script: Best regards, Mike