Hey @HlaThit
I thinks this is a duplicate of this. Having said that you can see the API docs at http://localhost:18000/api-docs/ for the development environment or <your_instance_url>/api-docs. You can search for “enrollment” which will give you something like this:
This is a swagger UI so you can as well interact with it and see if you can achieve what you set out for. 
Let me know if this helped you or you have any follow up.