Setting exposure of camera

Hello.

I am wondering how to set the exposure of a camera in Isaac Sim, programatically from Python. I expect different exposure settings to produce differently illuminated images of the same scene. I tried using GetShutterOpenAttr and GetShutterCloseAttr of the UsdGeom.Camera but this seem to be ignored as written at the bottom of
https://docs.omniverse.nvidia.com/app_create/prod_materials-and-rendering/cameras.html

How can I set the exposure?
Thank you in advance.