WebCenter Spaces REST API.. Logout ability?

[JRSim_UIX]

Does anyone know how to logout/login as a new user with the WebCenter Spaces REST API once you have an active session -
http://docs.oracle.com/cd/E21764_01/webcenter.1111/e12405/wcadm_security_id_store.htm#WCADM6881

I have tried to supersede the login with a new login, passing in a new user trustServiceToken via OIT and also tried with the Basic Base64 encoded user/pass with no success the initial logged in session remains active.
Currently using AJAX calls with the REST API.

Was hoping it would be something as simple as using a "CRUD" DELETE call on root /rest/api/resourceIndex
Can anyone point me in the right direction; as I can't see this documented on Oracle Docs.

Thanks
J.