So far I've followed the steps in "Users as clients with token" (found under admin/settings.php?section=webservicesoverview) and I've enabled web services in advanced features, I enabled the soap protocol, and I created a custom service and configured it as recommended. I also created the webservice role and assigned a webservice user with that role as a system role.
However, I can't seem to figure out what functions to include and how to actually implement it. Any help is much appreciated. Thanks!