$PARTNER_ID = '#####';
    $PARTNER_SECRET_KEY = '3f77efa584f0efb2................................80acbc6214498f54e18abce';
    $TIME = time();
    $concatenated_string = $PARTNER_ID . $TIME . $PARTNER_SECRET_KEY;
    $accessKey= sha1($concatenated_string);

    $postdata = http_build_query(
        array(
            'partnerId' => $PARTNER_ID,
            'time' => $TIME,
            'accessKey' => $accessKey
        )
    );

    $opts = array('http' =>
        array(
            'method'  => 'POST',
            'header'  => 'Content-type: application/x-www-form-urlencoded',
            'content' => $postdata
        )
    );

    $context  = stream_context_create($opts);

    $token = file_get_contents('https://-------.pandats-api.io/api/v3/authorization', false, $context);

    var_dump($token);