var uri = new Soup.URI.c_new("http://www.roojs.com/admin.php");
var msg = new Soup.Message({method:"GET", uri:uri});
-var auth = new Soup.Auth();
+var auth = new Soup.Auth.c_new(Soup.AuthBasic.type);
auth.authenticate('a','b');
print(auth.get_authorization(msg));