title: Spring SAML - how to add custom fields on the SP HTTP request?
body: <p>My service provider uses HTTP-Post binding to send the request to the IDP. I need to add new fields to the form. Right now I'm sending the "SAMLRequest" and "RelayState", but I also need to send "option" and "profile", these are fields required by our IDP. How can I accomplish this with Spring Saml security? </p>