const form = new FormData();
form.append('file', '<string>');
form.append('contract_id', '<string>');

const options = {method: 'POST', headers: {Authorization: 'Basic <encoded-value>'}};

options.body = form;

fetch('https://api.opereit.ai/v1/invoice-audits', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

{
  "audit": {
    "id": "<string>",
    "contract_id": "<string>",
    "status": "PENDING",
    "created_at": "2023-11-07T05:31:56Z",
    "carrier_name": "<string>",
    "status_reason": "<string>",
    "total_line_items": 123,
    "completed_at": "2023-11-07T05:31:56Z",
    "file": {
      "id": "<string>",
      "file_url": "<string>",
      "file_name": "<string>",
      "original_file_name": "<string>",
      "created_at": "2023-11-07T05:31:56Z",
      "file_size_bytes": 123,
      "invoice_number": "<string>",
      "invoice_date": "2023-12-25",
      "account_number": "<string>",
      "billing_period_start": "2023-12-25",
      "billing_period_end": "2023-12-25",
      "currency": "<string>"
    }
  }
}

{
  "statusCode": 400,
  "statusReasonCode": "INVALID_REQUEST_BODY",
  "error": "Invalid request body",
  "details": {
    "formErrors": [],
    "fieldErrors": {}
  }
}

{
  "statusCode": 401,
  "statusReasonCode": "AUTHENTICATION_REQUIRED",
  "error": "Authentication required"
}

{
  "statusCode": 404,
  "statusReasonCode": "CONTRACT_NOT_FOUND",
  "error": "Contract not found"
}