rest api saml sso

I have created a rest api in SAP that has SSL and SAML configuration.

I made sure that SAML/SSL was working correctly by creating a Visual Studio C# program and running it. 

It ran successfully without having me enter my password and it used my laptop log on id.

Is there a way to do the same thing in Appian?

Call the rest service sending the laptop logon information without having to enter a userid/password.

thanks for your help.

Scott Overmeyer