axios({
method: 'get',
url: `https://demo.docusign.net/restapi/v2/accounts/{AccountID}/envelopes/{ID}/documents/1`,
headers: {
    'X-DocuSign-Authentication': JSON.stringify({
        "Username": docusign.username,
        "Password": docusign.password,
        "IntegratorKey": docusign.integratorKey
    }),
    'Content-Type': 'application/json'
},
}).then(response =>  {
    fs.writeFileSync('./i.pdf', response.data, {encoding: 'binary'})
}).catch(console.log)

使用上面的代码我无法保存正确的文件，你能帮忙吗？

docusignapi docusign