curl --request GET \
  --url https://api.voice.ai/agent/v1/agent/dashboard

{
  "number_of_calls": 123,
  "average_duration": 123,
  "total_credits_used": 123,
  "avg_credits_per_call": 123,
  "daily_stats": [
    {
      "date": "<string>",
      "total_calls": 123,
      "total_credits": 123
    }
  ]
}