using Auth0.ManagementApi;
using System.Threading.Tasks;

public partial class Examples
{
    public async Task Example() {
        var client = new ManagementApiClient(
            token: "<token>",
            clientOptions: new ClientOptions { BaseUrl = "https://{YOUR_DOMAIN}/api/v2" }
        );

        await client.CustomDomains.GetDefaultAsync();
    }

}

package com.example.usage;

import com.auth0.client.mgmt.ManagementApi;

public class Example {
    public static void main(String[] args) {
        ManagementApi client = ManagementApi
            .builder()
            .domain("{YOUR_DOMAIN}")
            .token("<token>")
            .build();

        client.customDomains().getDefault();
    }
}

<?php

namespace Example;

use Auth0\SDK\API\Management\Wrapper\ManagementClient;
use Auth0\SDK\API\Management\Wrapper\ManagementClientOptions;

$client = new ManagementClient(new ManagementClientOptions(
    domain: '{YOUR_DOMAIN}',
    token: '<token>',
));
$client->customDomains->getDefault();

from auth0.management import ManagementClient

client = ManagementClient(
    domain="{YOUR_DOMAIN}",
    token="<token>",
)

client.custom_domains.get_default()

require "auth0"

client = Auth0::Management.new(token: "<token>", base_url: "https://{YOUR_DOMAIN}/api/v2")

client.custom_domains.get_default

curl --request GET \
  --url https://{tenantDomain}/api/v2/custom-domains/default \
  --header 'Authorization: Bearer <token>'

const options = {method: 'GET', headers: {Authorization: 'Bearer <token>'}};

fetch('https://{tenantDomain}/api/v2/custom-domains/default', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

package main

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

func main() {

	url := "https://{tenantDomain}/api/v2/custom-domains/default"

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

	req.Header.Add("Authorization", "Bearer <token>")

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

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

	fmt.Println(string(body))

}

{
  "custom_domain_id": "cd_0000000000000001",
  "domain": "login.mycompany.com",
  "primary": false,
  "status": "ready",
  "type": "self_managed_certs",
  "is_default": false,
  "origin_domain_name": "mycompany_cd_0000000000000001.edge.tenants.auth0.com",
  "verification": {
    "methods": [
      {
        "name": "txt",
        "record": "auth0-domain-verification=...",
        "domain": "_cf-custom-hostname.login.mycompany.com"
      }
    ],
    "status": "verified",
    "error_msg": "<string>",
    "last_verified_at": "<string>"
  },
  "custom_client_ip_header": "<string>",
  "tls_policy": "recommended",
  "domain_metadata": {},
  "certificate": {
    "status": "provisioning",
    "error_msg": "<string>",
    "certificate_authority": "letsencrypt",
    "renews_before": "<string>"
  },
  "relying_party_identifier": "<string>"
}