$pdo = connectToDB();
        $userData = getUserData($pdo);
function getUserData($pdo) {
    $data = $pdo->prepare("SELECT User_ID FROM Users WHERE Username = :username AND Password = :password");
    $data->bindValue(':username', trim($_POST['username']));
    $data->bindValue(':password', trim($_POST['password']));
    $data->execute();
    $x = $data->columnCount();
    print($x);
}
function connectToDB() {
    require_once 'config.php';
    if($pdo = new PDO('mysql:host='.HOST.';port='.PORT.';dbname='.DB.';charset=utf8' , USER, PASSWORD))
        return $pdo;
    else
        return "Couldn't connect to Database";
}