const options = {
  method: 'POST',
  headers: {Authorization: 'Basic <encoded-value>', 'Content-Type': 'application/json'},
  body: JSON.stringify({document_ids: ['<string>']})
};

fetch('https://api.opereit.ai/v1/claims/{id}/documents/complete', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

{
  "attached": 123,
  "documents": [
    {
      "id": "<string>",
      "status": "confirmed",
      "reason": "document_not_found"
    }
  ]
}

{
  "statusCode": 400,
  "statusReasonCode": "INVALID_REQUEST_BODY",
  "error": "Invalid request body",
  "details": {
    "formErrors": [],
    "fieldErrors": {
      "document_ids": [
        "At least one document is required"
      ]
    }
  }
}

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

{
  "statusCode": 404,
  "statusReasonCode": "CLAIM_NOT_FOUND",
  "error": "Claim not found"
}

{
  "statusCode": 500,
  "statusReasonCode": "INTERNAL_ERROR",
  "error": "Internal server error"
}