function getUserID () {
    return $_SESSION['steamid'];

}
    /* Connect to a MySQL database using driver invocation */
    $dsn = 'mysql:dbname=name;host=csgo-skinz.lima-db.de';
    $user = 'user';
    $password = 'pw';

    try {
        $pdo = new PDO($dsn, $user, $password);
    } catch (PDOException $e) {
        echo 'Connection failed: ' . $e->getMessage();
    }
function getUserCredits() {

    global $pdo;
    $steamid = getUserID();
    $statement = $pdo->prepare("SELECT user_credits FROM users WHERE steamid='".$_SESSION['steamid']."'");
    $result = $statement->execute(array('steamid' => $steamid));
    $user = $statement->fetch();
    return $user['user_credits'];
}