curl --request GET \
  --url https://v2-nova-api.prod.czmx.in/org/{org_id}/analytics/calls/costs

{
  "period": {
    "end": "<string>",
    "start": "<string>"
  },
  "time_series": [
    {
      "avg_cost_per_call": 123,
      "date": "<string>",
      "total_calls": 123,
      "total_cost_usd": 123,
      "total_tokens": 123
    }
  ]
}