curl --request GET \
  --url https://api.scholarlysoftware.com/api/v1/workflow_groups/{id}/children \
  --header 'Authorization: Bearer <token>'

{
  "data": [
    {
      "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "type": "workflow_group",
      "attributes": {
        "created_at": "<string>",
        "updated_at": "<string>",
        "name": "<string>"
      },
      "relationships": {
        "workflow": {
          "links": {
            "related": "<string>"
          },
          "meta": {},
          "data": {
            "type": "workflow",
            "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a"
          }
        },
        "parent": {
          "links": {
            "related": "<string>"
          },
          "meta": {},
          "data": {
            "type": "workflow_group",
            "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a"
          }
        },
        "children": {
          "links": {
            "related": "<string>"
          },
          "meta": {}
        }
      }
    }
  ],
  "meta": {
    "page": {
      "size": 123
    },
    "total": 123
  },
  "links": {
    "self": "<string>",
    "first": "<string>",
    "next": "<string>",
    "prev": "<string>",
    "last": "<string>"
  }
}