Hey,
pls have a look in \Api\docs\postman\
- there are postman examples that you can reuse to test against your environment.
From there, you can export the (hopefully working) request as php code as well, i.e. something like:
<?php
$curl = curl_init();
curl_setopt_array($curl, array(
CURLOPT_URL => "<your system url>/Api/access_token",
CURLOPT_RETURNTRANSFER => true,
CURLOPT_ENCODING => "",
CURLOPT_MAXREDIRS => 10,
CURLOPT_TIMEOUT => 0,
CURLOPT_FOLLOWLOCATION => true,
CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
CURLOPT_CUSTOMREQUEST => "POST",
CURLOPT_POSTFIELDS => "grant_type=client_credentials&client_id=<client-id>&client_secret=<client-secret>",
CURLOPT_HTTPHEADER => array(
"Content-Type: application/x-www-form-urlencoded"
),
));
$response = curl_exec($curl);
curl_close($curl);
echo $response;