curl --request GET \
  --url https://qubesync.com/api/v1/connections/{connection_id}/invoices \
  --header 'Authorization: Basic <encoded-value>'

{
  "data": {
    "id": "550e8400-e29b-41d4-a716-446655440000",
    "state": "waiting",
    "webhook_state": "not_applicable",
    "request_xml": "<QBXML><QBXMLMsgsRq onError='stopOnError'><CustomerQueryRq requestID='1'><MaxReturned>100</MaxReturned></CustomerQueryRq></QBXMLMsgsRq></QBXML>",
    "request_json": {
      "version": "13.0",
      "request": {
        "name": "CustomerQueryRq",
        "attributes": {
          "request_id": "1"
        },
        "children": [
          {
            "name": "MaxReturned",
            "text": "100"
          }
        ]
      }
    },
    "response_xml": "<QBXML><QBXMLMsgsRs statusCode='0' statusSeverity='Info' statusMessage='Status OK'><CustomerQueryRs requestID='1' statusCode='0' statusSeverity='Info' statusMessage='Status OK'><CustomerRet><ListID>80000001-1234567890</ListID><Name>Sample Customer</Name></CustomerRet></CustomerQueryRs></QBXMLMsgsRs></QBXML>",
    "response_json": [
      {}
    ],
    "webhook_url": "https://example.com/webhook",
    "webhook_attempts": [
      {
        "attempted_at": "2023-11-07T05:31:56Z",
        "response": "<string>"
      }
    ],
    "webhook_error": "<string>",
    "error": {
      "message": "<string>",
      "code": "<string>",
      "details": {}
    },
    "links": {
      "self": "/api/v1/connections/123e4567-e89b-12d3-a456-426614174000/queued_requests/550e8400-e29b-41d4-a716-446655440000",
      "ui": "/app/queued_requests/550e8400-e29b-41d4-a716-446655440000",
      "connection_ui": "/app/connections/123e4567-e89b-12d3-a456-426614174000"
    },
    "inserted_at": "2023-01-01T12:00:00Z",
    "updated_at": "2023-01-01T12:00:01Z",
    "connection_id": "123e4567-e89b-12d3-a456-426614174000"
  }
}