How to fix a bug with authorization?

Question

Qt

In QT, authorization is done by entering a login and password. But if you close the input window, it takes it as the correct password entry and puts the window on the trail.

#include "login.h"
#include "ui_login.h"

Login::Login(QWidget *parent) :
    QDialog(parent),
    ui(new Ui::Login)
{
    ui->setupUi(this);
    ui->label->hide();
}

Login::~Login()
{
    delete ui;
}

void Login::on_OkayButton_clicked()
{
    QVector<QString> Logins[2];
    Logins[0].push_back("log");
    Logins[1].push_back("123");
    Logins[0].push_back("login");
    Logins[1].push_back("12345");
    Logins[0].push_back("gol");
    Logins[1].push_back("12345");
    int index=0;
    for(int i=0; i<Logins[0].size();i++)
    {
        if (ui->LoginEdit->text()==Logins[0][i])
        {
            index=i;

        }

    }
    if(ui->PaswordEdit->text()==Logins[1][index])
    {
        rightPass=true;
        close();
    }
    else
    {
        rightPass=false;
        ui->label->show();
    }
}

void Login::on_label_destroyed()
{
    rightPass=false;
    ui->label->show();
}

Answer 1

override closeEvent:
void closeEvent(QCloseEvent * event){
if (!rightPass){
qApp->closeAllWindows();
}
}
on_label_destroyed - it will not be needed
to store login-password pairs, I would use QMap
so, in my opinion, it's easier to check the correctness of the input