curl --request POST \
  --url https://api.dfns.io/auth/login \
  --header 'Content-Type: application/json' \
  --data '
{
  "challengeIdentifier": "<string>",
  "firstFactor": {
    "kind": "Fido2",
    "credentialAssertion": {
      "credId": "<string>",
      "clientData": "<string>",
      "signature": "<string>",
      "authenticatorData": "<string>",
      "algorithm": "<string>",
      "userHandle": "<string>"
    }
  },
  "secondFactor": {
    "kind": "Fido2",
    "credentialAssertion": {
      "credId": "<string>",
      "clientData": "<string>",
      "signature": "<string>",
      "authenticatorData": "<string>",
      "algorithm": "<string>",
      "userHandle": "<string>"
    }
  }
}
'

import requests

url = "https://api.dfns.io/auth/login"

payload = {
    "challengeIdentifier": "<string>",
    "firstFactor": {
        "kind": "Fido2",
        "credentialAssertion": {
            "credId": "<string>",
            "clientData": "<string>",
            "signature": "<string>",
            "authenticatorData": "<string>",
            "algorithm": "<string>",
            "userHandle": "<string>"
        }
    },
    "secondFactor": {
        "kind": "Fido2",
        "credentialAssertion": {
            "credId": "<string>",
            "clientData": "<string>",
            "signature": "<string>",
            "authenticatorData": "<string>",
            "algorithm": "<string>",
            "userHandle": "<string>"
        }
    }
}
headers = {"Content-Type": "application/json"}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {'Content-Type': 'application/json'},
  body: JSON.stringify({
    challengeIdentifier: '<string>',
    firstFactor: {
      kind: 'Fido2',
      credentialAssertion: {
        credId: '<string>',
        clientData: '<string>',
        signature: '<string>',
        authenticatorData: '<string>',
        algorithm: '<string>',
        userHandle: '<string>'
      }
    },
    secondFactor: {
      kind: 'Fido2',
      credentialAssertion: {
        credId: '<string>',
        clientData: '<string>',
        signature: '<string>',
        authenticatorData: '<string>',
        algorithm: '<string>',
        userHandle: '<string>'
      }
    }
  })
};

fetch('https://api.dfns.io/auth/login', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://api.dfns.io/auth/login",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => json_encode([
    'challengeIdentifier' => '<string>',
    'firstFactor' => [
        'kind' => 'Fido2',
        'credentialAssertion' => [
                'credId' => '<string>',
                'clientData' => '<string>',
                'signature' => '<string>',
                'authenticatorData' => '<string>',
                'algorithm' => '<string>',
                'userHandle' => '<string>'
        ]
    ],
    'secondFactor' => [
        'kind' => 'Fido2',
        'credentialAssertion' => [
                'credId' => '<string>',
                'clientData' => '<string>',
                'signature' => '<string>',
                'authenticatorData' => '<string>',
                'algorithm' => '<string>',
                'userHandle' => '<string>'
        ]
    ]
  ]),
  CURLOPT_HTTPHEADER => [
    "Content-Type: application/json"
  ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

package main

import (
	"fmt"
	"strings"
	"net/http"
	"io"
)

func main() {

	url := "https://api.dfns.io/auth/login"

	payload := strings.NewReader("{\n  \"challengeIdentifier\": \"<string>\",\n  \"firstFactor\": {\n    \"kind\": \"Fido2\",\n    \"credentialAssertion\": {\n      \"credId\": \"<string>\",\n      \"clientData\": \"<string>\",\n      \"signature\": \"<string>\",\n      \"authenticatorData\": \"<string>\",\n      \"algorithm\": \"<string>\",\n      \"userHandle\": \"<string>\"\n    }\n  },\n  \"secondFactor\": {\n    \"kind\": \"Fido2\",\n    \"credentialAssertion\": {\n      \"credId\": \"<string>\",\n      \"clientData\": \"<string>\",\n      \"signature\": \"<string>\",\n      \"authenticatorData\": \"<string>\",\n      \"algorithm\": \"<string>\",\n      \"userHandle\": \"<string>\"\n    }\n  }\n}")

	req, _ := http.NewRequest("POST", url, payload)

	req.Header.Add("Content-Type", "application/json")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.post("https://api.dfns.io/auth/login")
  .header("Content-Type", "application/json")
  .body("{\n  \"challengeIdentifier\": \"<string>\",\n  \"firstFactor\": {\n    \"kind\": \"Fido2\",\n    \"credentialAssertion\": {\n      \"credId\": \"<string>\",\n      \"clientData\": \"<string>\",\n      \"signature\": \"<string>\",\n      \"authenticatorData\": \"<string>\",\n      \"algorithm\": \"<string>\",\n      \"userHandle\": \"<string>\"\n    }\n  },\n  \"secondFactor\": {\n    \"kind\": \"Fido2\",\n    \"credentialAssertion\": {\n      \"credId\": \"<string>\",\n      \"clientData\": \"<string>\",\n      \"signature\": \"<string>\",\n      \"authenticatorData\": \"<string>\",\n      \"algorithm\": \"<string>\",\n      \"userHandle\": \"<string>\"\n    }\n  }\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.dfns.io/auth/login")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Post.new(url)
request["Content-Type"] = 'application/json'
request.body = "{\n  \"challengeIdentifier\": \"<string>\",\n  \"firstFactor\": {\n    \"kind\": \"Fido2\",\n    \"credentialAssertion\": {\n      \"credId\": \"<string>\",\n      \"clientData\": \"<string>\",\n      \"signature\": \"<string>\",\n      \"authenticatorData\": \"<string>\",\n      \"algorithm\": \"<string>\",\n      \"userHandle\": \"<string>\"\n    }\n  },\n  \"secondFactor\": {\n    \"kind\": \"Fido2\",\n    \"credentialAssertion\": {\n      \"credId\": \"<string>\",\n      \"clientData\": \"<string>\",\n      \"signature\": \"<string>\",\n      \"authenticatorData\": \"<string>\",\n      \"algorithm\": \"<string>\",\n      \"userHandle\": \"<string>\"\n    }\n  }\n}"

response = http.request(request)
puts response.read_body

{
  "token": "<string>"
}