Returns call counter metrics org-wide.

curl --request GET \
  --url 'https://api-trial.cognigy.ai/new/v3.0/callcounter?api_key=' \
  --header 'Authorization: Bearer <token>' \
  --header 'X-API-Key: <api-key>'

{
  "items": [
    {
      "day": 123,
      "month": 123,
      "year": 123,
      "maxConcurrency": 123,
      "callMinutes": 123,
      "processedCalls": 123,
      "billableCalls": 123
    }
  ]
}