REST API to Add Employee to Global Access Group

Summary:

Is there any REST API available to add an Employee to a specific Global Access Group?
We have an integration where the Worker profile is created using a REST API.
After the profile creation, the user will be redirected to the HCM Learning application.
However, since these Workers are newly created and not yet part of the Access Group, they are unable to access the courses immediately.
While we have the Process User Access scheduled to run, this process takes 12 to 16 hours, causing delays in providing access to courses.
Therefore, we are exploring options to add the Worker directly to the Access Group after Worker creation using a REST API.