curl --request GET \
  --url https://restapi.deepdub.ai/api/v1/usage/concurrent \
  --header 'x-api-key: <api-key>'

{
  "customerId": "<string>",
  "from": "2023-12-25",
  "to": "2023-12-25",
  "items": [
    {
      "date": "2023-12-25",
      "customerId": "<string>",
      "modelId": "<string>",
      "region": "<string>",
      "usageSecondsTimesSize": 123,
      "concurrencyHours": 123,
      "averageSize": 123
    }
  ]
}