curl --request POST \
  --url https://sandbox.birrpay.io/{customer_id}/payment_methods/{payment_method_id}/default \
  --header 'api-key: <api-key>'

import requests

url = "https://sandbox.birrpay.io/{customer_id}/payment_methods/{payment_method_id}/default"

headers = {"api-key": "<api-key>"}

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

print(response.text)

const options = {method: 'POST', headers: {'api-key': '<api-key>'}};

fetch('https://sandbox.birrpay.io/{customer_id}/payment_methods/{payment_method_id}/default', 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://sandbox.birrpay.io/{customer_id}/payment_methods/{payment_method_id}/default",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_HTTPHEADER => [
    "api-key: <api-key>"
  ],
]);

$response = curl_exec($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://sandbox.birrpay.io/{customer_id}/payment_methods/{payment_method_id}/default"

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

	req.Header.Add("api-key", "<api-key>")

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

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

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.post("https://sandbox.birrpay.io/{customer_id}/payment_methods/{payment_method_id}/default")
  .header("api-key", "<api-key>")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://sandbox.birrpay.io/{customer_id}/payment_methods/{payment_method_id}/default")

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

request = Net::HTTP::Post.new(url)
request["api-key"] = '<api-key>'

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

{
  "customer_id": "cus_y3oqhf46pyzuxjbcn2giaqnb44",
  "payment_method": "card",
  "default_payment_method_id": "card_rGK4Vi5iSW70MY7J2mIg",
  "payment_method_type": "ach"
}