GET /invoices/download/status/{request_id} once the request reaches completed status.curl --location 'https://api.gigstack.io/v2/invoices/download/package/pkg_1234567890?team=undefined' \
--header 'Authorization: <api-key>'{
"success": false,
"error": {
"code": "validation_failed",
"message": "Request validation failed",
"details": "string"
},
"timestamp": 1767225600000
}