public function setSession($row) {
    $_SESSION['session'] = [
        'id' => $row['id'],
        'username' => $row['username'],
        'email' => $row['email'],
        'level' => $row['level']
    ];
    //set cookie
    $hashcode = md5(uniqid(rand(), TRUE));
    setcookie("shpre", $hashcode, time()+3600 * 24 * 365);
}