curl --request GET \
  --url https://api.example.com/v2/analytics/tasks/calendar \
  --header 'Authorization: Bearer <token>'

{
  "calendar_data": [
    {
      "date": "2023-12-25",
      "open_count": 1,
      "due_count": 1,
      "payment_promises_count": 0,
      "invoices_due_amount": 0,
      "invoices_due_customers": 0
    }
  ]
}