Аутентификация c++

class Dialog : public QDialog
{
    Q_OBJECT
public:
    Dialog(QWidget *parent = 0);
    QString getLogin() const;
    QString getPass() const;
private:
    QString login;
    QString pass;
    QLabel *labelLogin;
    QLabel *labelPass;
    QLineEdit *editLogin;
    QLineEdit *editPass;
    QPushButton *buttonCancel;
    QPushButton *buttonEnter;
    void createWidgets();
private slots:
    void slotButtonEnabled();
    void slotAccept();

Dialog::Dialog (QWidget *parent) : QDialog (parent)
{
    login = "";
    pass = "";
    createWidgets();
}
 
void Dialog::createWidgets()
{
    labelLogin = new QLabel(tr("Логин"), this);
    LabelPass = new QLabel(tr("Пароль"), this);
    editLogin = new QLineEdit (this);
    editPass = new QLineEdit (this);
    editPass->setEchoMode(QLineEdit::Password);
    buttonCancel = new QPushButton (tr("Отмена"), this);
    buttonEnter = new QPushButton (tr("Вход"), this);
    buttonEnter->setEnabled(false);
    connect (editLogin, &QLineEdit::textChanged, this, &Dialog::slotButtonEnabled);
    connect (editPass, &QLineEdit::textChanged, this, &Dialog::slotButtonEnabled);
    connect (buttonCancel, &QPushButton::clicked, this, &Dialog::reject); // не уверен в правильности написания слотов, креатор подскажет.
    connect (buttonEnter, &QPushButton::clicked, this, &Dialog::slotAccept);
    QGridLayout *glay = new QGridLayout;
    glay->addWidget(labelLogin, 0, 0);
    glay->addWidget(editLogin, 0, 1);
    glay->addWidget(labelPass, 1, 0);
    glay->addWidget(editPass, 1, 1);
 
    QHBoxLayout *hlay = new QHBoxLayout();
    hlay->addStretch();
    hlay->addWidget(buttonEnter);
    hlay->addWidget(buttonCancel);
 
    QVBoxLyaout *vlay = new QVBoxLayout();
    vlay->addLayout(glay);
    vlay->addLayout(hlay);
 
    setLayout(vlay);
 
}
 
void Dialog::slotButtonEnabled
{
    buttonEnter->setEnabled( !editLogin->text().isEmpty() && !editPass->text().isEmpty() );
}
 
void Dialog::slotAccept()
{
    login = editLogin->text();
    pass = editPass->text();
    accept();
}