Answering Angular requests with restify

Question

So I am trying to build a restify backend to answer these Angularjs calls. The problem is that angular sends the data via Request Payload (Chrome Dev Tools | no idea what that is).

Angularjs call:

var userDetails = {
   username:"username",
   password:"password"
}
$http.post('http://localhost:8080/login',userDetails,{}).success(function(data){});

As far as I know with restify I can only access data saved in the URL

http://localhost:8080/login/username/password

Here I would just use:

server.post("/login/:username/:password", function(req,res,next){
    console.log(req.params);
});

But how can I access the Request Payload?

If that is not possible can I get Angular to make the calls to fit restify.