curl --request GET \
  --url https://api.opal.dev/v1/idp-group-mappings/{app_resource_id} \
  --header 'Authorization: Bearer <token>'

{
  "mappings": [
    {
      "group_id": "6f99639b-7928-4043-8184-47cbc6766145",
      "alias": "finance-team",
      "hidden_from_end_user": false
    },
    {
      "group_id": "7870617d-e72a-47f5-a84c-693817ab4567",
      "alias": "engineering-team",
      "hidden_from_end_user": false
    }
  ]
}