PHP CURL code to authenticate with Flarum API

auth.php

<?php

// Details to access Flarum
$api_url = "https://my.forum.url/api/token";
$username = "my_flarum_user";
$password = "my_flarum_pass";

// CURL call
$ch = curl_init($api_url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);
curl_setopt($ch, CURLOPT_HTTPHEADER, [
   'Content-Type: application/json'
]);
curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode([
  'identification' => $username,
  'password'       => $password
]));

$result = curl_exec($ch);
$session = json_decode($result);

$session->token; // API Token
$session->userId; // Authenticated user ID