Open Source Document Management System | OpenKM

Hi,
I need to use OKMDocment web service API. But I couldn't find any docment which describes how to generate a "Session Authorization Token". As I see all the methods in this API, needs this token as a parameter. I am stuck at this point.
Can anybody point me to a correct direction. Thanks...

token is returned by okmAuth.login. See String login(String user, String pass).