Authentication issues calling java servlet from an XS Application in HCP

Hi Experts.

I am calling from an XS Application a java servlet via AJAX request but I am getting the "User Not Logged-in" error.

Do you know what cookies, credentials, tokens I would have to pass as parameter at the AJAX request header/body in order that the java servlet could inherit the SAML authentication of the XS App ?

Thanks and Regards

Eduardo