Help needed in OpenXR haptics

Godot Version

godot 4

Question

Hello. I’m trying to learn Godot by creating simple VR game. It has been fun but I’ve hit my first roadblock trying to implement haptics for VR controllers. I’m using OpenXR and trying to use trigger_haptic_pulse. Documentation is very limited in that area. I’m not sure obout two first params - action_name: String, tracker_name: StringName. I tried looking for info (went through OpenXR specification) and googled but found no answers. Any ideas?
M.