curl --request GET \
  --url https://demo.onlinebillingform.com/api/v2/package/group/lists \
  --header 'Authorization: Bearer <token>'

{
  "success": true,
  "groups": {
    "current_page": 1,
    "data": [
      {
        "id": 1221,
        "name": "Test Package Group",
        "type": 1,
        "visible": "1"
      }
    ],
    "last_page": 1,
    "total": 2
  }
}