curl --request PUT \
  --url https://int-api.mx.com/users/{user_identifier} \
  --header 'Accept-Version: <accept-version>' \
  --header 'Authorization: Basic <encoded-value>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "user": {
    "email": "example@example.com",
    "id": "My-Unique-ID",
    "is_disabled": false,
    "metadata": "{\\\"first_name\\\": \\\"Steven\\\", \\\"last_name\\\": \\\"Universe\\\"}"
  }
}
'

import requests

url = "https://int-api.mx.com/users/{user_identifier}"

payload = { "user": {
        "email": "example@example.com",
        "id": "My-Unique-ID",
        "is_disabled": False,
        "metadata": "{\\"first_name\\": \\"Steven\\", \\"last_name\\": \\"Universe\\"}"
    } }
headers = {
    "Accept-Version": "<accept-version>",
    "Authorization": "Basic <encoded-value>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'PUT',
  headers: {
    'Accept-Version': '<accept-version>',
    Authorization: 'Basic <encoded-value>',
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({
    user: {
      email: 'example@example.com',
      id: 'My-Unique-ID',
      is_disabled: false,
      metadata: '{\"first_name\": \"Steven\", \"last_name\": \"Universe\"}'
    }
  })
};

fetch('https://int-api.mx.com/users/{user_identifier}', 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://int-api.mx.com/users/{user_identifier}",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "PUT",
  CURLOPT_POSTFIELDS => json_encode([
    'user' => [
        'email' => 'example@example.com',
        'id' => 'My-Unique-ID',
        'is_disabled' => false,
        'metadata' => '{\\"first_name\\": \\"Steven\\", \\"last_name\\": \\"Universe\\"}'
    ]
  ]),
  CURLOPT_HTTPHEADER => [
    "Accept-Version: <accept-version>",
    "Authorization: Basic <encoded-value>",
    "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://int-api.mx.com/users/{user_identifier}"

	payload := strings.NewReader("{\n  \"user\": {\n    \"email\": \"example@example.com\",\n    \"id\": \"My-Unique-ID\",\n    \"is_disabled\": false,\n    \"metadata\": \"{\\\\\\\"first_name\\\\\\\": \\\\\\\"Steven\\\\\\\", \\\\\\\"last_name\\\\\\\": \\\\\\\"Universe\\\\\\\"}\"\n  }\n}")

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

	req.Header.Add("Accept-Version", "<accept-version>")
	req.Header.Add("Authorization", "Basic <encoded-value>")
	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.put("https://int-api.mx.com/users/{user_identifier}")
  .header("Accept-Version", "<accept-version>")
  .header("Authorization", "Basic <encoded-value>")
  .header("Content-Type", "application/json")
  .body("{\n  \"user\": {\n    \"email\": \"example@example.com\",\n    \"id\": \"My-Unique-ID\",\n    \"is_disabled\": false,\n    \"metadata\": \"{\\\\\\\"first_name\\\\\\\": \\\\\\\"Steven\\\\\\\", \\\\\\\"last_name\\\\\\\": \\\\\\\"Universe\\\\\\\"}\"\n  }\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://int-api.mx.com/users/{user_identifier}")

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

request = Net::HTTP::Put.new(url)
request["Accept-Version"] = '<accept-version>'
request["Authorization"] = 'Basic <encoded-value>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"user\": {\n    \"email\": \"example@example.com\",\n    \"id\": \"My-Unique-ID\",\n    \"is_disabled\": false,\n    \"metadata\": \"{\\\\\\\"first_name\\\\\\\": \\\\\\\"Steven\\\\\\\", \\\\\\\"last_name\\\\\\\": \\\\\\\"Universe\\\\\\\"}\"\n  }\n}"

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

{
  "user": {
    "email": "example@example.com",
    "guid": "USR-d74cb14f-fd0a-449f-991b-e0362a63d9c6",
    "id": "My-Unique-ID",
    "is_disabled": false,
    "metadata": "{\\\"first_name\\\": \\\"Steven\\\", \\\"last_name\\\": \\\"Universe\\\"}"
  }
}