curl --request POST \
  --url https://my.server.express/api/v1/auth/2fa/options \
  --header 'Content-Type: application/json' \
  --data '
{
  "preAuthToken": "<string>"
}
'

const options = {
  method: 'POST',
  headers: {'Content-Type': 'application/json'},
  body: JSON.stringify({preAuthToken: '<string>'})
};

fetch('https://my.server.express/api/v1/auth/2fa/options', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

import requests

url = "https://my.server.express/api/v1/auth/2fa/options"

payload = { "preAuthToken": "<string>" }
headers = {"Content-Type": "application/json"}

response = requests.post(url, json=payload, headers=headers)

print(response.text)

{
  "success": true,
  "data": {
    "challenge": "<string>",
    "timeout": 123,
    "rpId": "<string>",
    "allowCredentials": [
      {
        "id": "<string>",
        "type": "public-key",
        "transports": [
          "<string>"
        ]
      }
    ],
    "userVerification": "preferred",
    "extensions": {}
  }
}

{
  "success": false,
  "error": "<string>"
}

{
  "success": false,
  "error": "<string>"
}