import Nuntly from '@nuntly/sdk';

const client = new Nuntly({
  apiKey: process.env['NUNTLY_API_KEY'],
});

const response = await client.messages.attachments.retrieve('messageId_value', 'attachmentId_value');

{
  "data": {
    "id": "<string>",
    "filename": "<string>",
    "contentType": "<string>",
    "size": 123,
    "contentDisposition": "<string>",
    "contentId": "<string>",
    "downloadUrl": "<string>"
  }
}