You can include control and functional parameters in the URL for ATG REST Web Services by using standard URL query string syntax and URL encoding. The following ATG Legacy REST example shows a URL with two functional parameters and a control parameter.
http://localhost:8280/rest/model/atg/userprofiling/ProfileActor/ login?login=JohnDoe@example.com&password=1234&atg-rest-user-input=MyMessageId