Hi,
The user profiles are not known by the Gaze SDK since it is a low-level SDK more like an access library to the eye tracker. The Gaze SDK only knows about calibrations. The user profiles are created and saved on local storage by the EyeX Engine (which in turn makes use of the Gaze SDK and the functions you found). In order to list or change the user profiles you have to use the EyeX Engine API, version 1.3.1 or later and an EyeX SDK with version 1.5 or later. As of this moment the EyeX SDK 1.5 is still under development but the plan is to release it within a couple of weeks.