curl --request POST \
  --url https://{tenant_id}.hanko.io/webauthn/registration/initialize \
  --cookie hanko=

import requests

url = "https://{tenant_id}.hanko.io/webauthn/registration/initialize"

headers = {"cookie": "hanko="}

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

print(response.text)

const options = {method: 'POST', headers: {cookie: 'hanko='}};

fetch('https://{tenant_id}.hanko.io/webauthn/registration/initialize', 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://{tenant_id}.hanko.io/webauthn/registration/initialize",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_COOKIE => "hanko=",
]);

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

curl_close($curl);

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

package main

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

func main() {

	url := "https://{tenant_id}.hanko.io/webauthn/registration/initialize"

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

	req.Header.Add("cookie", "hanko=")

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

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

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.post("https://{tenant_id}.hanko.io/webauthn/registration/initialize")
  .header("cookie", "hanko=")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://{tenant_id}.hanko.io/webauthn/registration/initialize")

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

request = Net::HTTP::Post.new(url)
request["cookie"] = 'hanko='

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

{
  "publicKey": {
    "rp": {
      "name": "Hanko Authentication Service",
      "id": "localhost"
    },
    "user": {
      "id": "pPQT9rwJRD7gVncsnCDNyN",
      "name": "user@example.com",
      "displayName": "user@example.com"
    },
    "challenge": "7qmkJUXR0dOFnsW48evX3qKdCzlGjvvqAAvMDN+KTN0=",
    "pubKeyCredParams": [
      {
        "type": "public-key",
        "alg": -7
      }
    ],
    "timeout": 60000,
    "authenticatorSelection": {
      "authenticatorAttachment": "platform",
      "requireResidentKey": true,
      "residentKey": "preferred",
      "userVerification": "required"
    },
    "attestation": "none"
  }
}

{
  "code": 400,
  "message": "Bad Request"
}

{
  "code": 422,
  "message": "Unprocessable Entity"
}

{
  "code": 500,
  "message": "Internal Server Error"
}