Get request header (REST API)

Hello,

In all web services, i need to my get login and token. So with Postman, i tried to call a HTTP request where I put the login/token in the header :

I tried to get data from Http request header. The REST APi use %CSP.REST. I tried something like that : 

But it didn't work..

Someone can give me some example or other method ?

Regards,