wpApiGetUsers.php

<?php
 $wp = new GuzzleHttp\Client();
    $request = $wp->get('http://www.example.com/wp-json/wp/v2/users');
    $statusCode = $request->getStatusCode();
    if($statusCode >= 200 && $statusCode < 300 ) {
        $users = json_decode($request->getBody());
        foreach($users as $user) {
            //var_dump($user->id);
            //var_dump($user->name);
            //var_dump($user->slug);
        }
    }