We are trying to create some custom groups that would be recipients of School Forms (Core → Content → School Forms → Settings → Recipients). Under recipients you can add a role, a school year, a grade, a group or people individually.
Building a group is a slow manual process where each person must be searched and selected. I am wondering if there is an API to add constituents to a group. We would use our data warehouse to retrieve the list of people we want then script out the necessary API calls.