List usage logs

{  "data": [    {      "request_id": "string",      "ts": "2019-08-24T14:15:22Z",      "model": "string",      "api_key_id": "string",      "status": "string",      "modality": "string",      "billable_units": 0,      "tokens_in": 0,      "tokens_out": 0,      "cost_credits": "string",      "latency_ms": 0,      "error": "string",      "operation_id": "string",      "status_history": [        {          "status": "queued",          "ts": "2019-08-24T14:15:22Z",          "cost_credits": "string",          "error": "string"        }      ]    }  ],  "next_cursor": "string"}