Authentication tokens

I am evaluating Request Tracker for use as a ticketing system to be integrated with our Java based application server.

I would like to be able to enrol new users of the Java application server with Request Tracker at the time a membership is created in the application server. The REST 1.0 and REST 2.0 interfaces provide a way to do this.

My question is. Is there currently a way to create authentication tokens using the REST interface. I can’t see one. Is there an extension which provides this functionality?