create log file
$upload = wp_upload_dir();
$upload_dir = $upload['basedir'];
$Today = date('Y-m-d H:i:s');
$upload_dir = $upload_dir . '/microbilt_token_logs';
if (!is_dir($upload_dir)) {
mkdir($upload_dir, 0775);
}
$myfile = fopen($upload_dir . "/microbilt_token_logs.txt", "a");
$log = $Today . "get request || (" . $post_id . " - " . $token . ") updated\n";
fwrite($myfile, $log);