zoom_server_to_server_oauth.php

<php
//uses Zumba Core HTTP as facade

function getToken(): string
{
    $zoomAccountId = '';
    $zoomClientId = '';
    $zoomClientSecret = '';

    $zoomOAuthUrl = 'https://zoom.us/oauth/token'; //note that this is not the same URL as the one for the API

    $request = new Http($zoomOAuthUrl);

    $request->headers([
        'Authorization: Basic ' . base64_encode("$zoomClientId:$zoomClientSecret"),
    ]);

    return $request->request('POST', [
        'grant_type' => 'account_credentials',
        'account_id' => $zoomAccountId
    ]);
}