curl --request GET \
  --url https://api.sigmamind.ai/v1/calls \
  --header 'X-API-Key: <api-key>'

{
  "data": [
    {
      "callId": "AuUKK371Spr5nHJS",
      "callType": "inbound",
      "conversationId": 123456789,
      "phoneNumber": "Object",
      "campaign": {
        "campaignId": "XiQEBcj9cc5TFRB4",
        "campaignName": "My Campaign",
        "campaignStatus": "live",
        "scheduledDate": "2023-11-07T05:31:56Z",
        "concurrentCalls": 5,
        "agent": {
          "name": "New AI Agent",
          "agentId": "D5D0p7TUs66TTAEAx",
          "status": "active"
        },
        "phoneNumber": "Object",
        "errors": [
          "<string>"
        ],
        "scheduled": true
      },
      "status": "completed",
      "startTime": "2021-04-20T10:00:00.000Z",
      "endTime": "2021-04-20T10:00:00.000Z",
      "duration": 120,
      "terminationReason": "inactive",
      "createdAt": "2021-04-20T10:00:00.000Z",
      "updatedAt": "2021-04-20T10:00:00.000Z",
      "variables": {
        "customer_name": "Michael"
      }
    }
  ],
  "page": 123,
  "size": 123,
  "totalCounts": 123,
  "totalPages": 123,
  "hasNext": true,
  "hasPrevious": true
}