Need help asap! Filestream

[Patch]

Hi! I'm so new to qt and i don't know how to do a filestream. I am creating a login form-filestream based. So i need to create a login form which has of course username and password. First what i did was to use SQLITE as a database and it worked. But the problem is. I have to use filestream that would end up making a new .txt file where the username and passwords would be inputed. I don't know the proper codes to be used in making a filestream from qt and i don't know where in my main code i should put it. i badly need help. The codes that are written there are for sqlite base but i need to change it to a filestream type that would be based from a .txt file. Here's my code:

#include "login.h"
#include "ui_login.h"
#include <QMessageBox>
#include <QPixmap>
#include <QFont>
#include <QSplashScreen>
#include <QTimer>
 
Login::Login(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::Login)
{
    ui->setupUi(this);
    QPixmap pix("C:/Users/Patch/Documents/COE113PROJ/Login/LOGINFORM/images/background.jpg");
    ui->background->setPixmap(pix);
 
    mydb = QSqlDatabase::addDatabase("QSQLITE");
    mydb.setDatabaseName("C:/Users/Patch/Documents/COE113PROJ/Login/LOGINFORM/sqlite/users.db");
 
    if(!mydb.open())
        ui->status->setText("Failed to open the database");
 
    else
        ui->status->setText("Connected Succesfuly");
}
 
Login::~Login()
{
    delete ui;
}
 
void Login::on_pushButton_login_clicked()
{
 
 
    QString name,password;
    name=ui->lineEdit_Username->text();
    password=ui->lineEdit_Password->text();
 
    if(!mydb.isOpen()){
 
        qDebug()<<"Failed to open the database";
        return;
    }
 
    QSqlQuery qry;
 
    if(qry.exec("select * from users.dbhalp.jpg where name='"+name+"'and password='"+password+"'"))
    {
        int count=0;
        while(qry.next())
        {
            count++;
        }
        if(count==1)
        {
            QMessageBox::information(this,"Login","Username and password is correct ");
            hide();
            secDiag = new SecDiag(this);
            secDiag->show();
 
        }
 
        if(count>1)
        {
            QMessageBox::information(this,"Login","Username and password is incorrect");
        }
        if(count<1)
        {
            QMessageBox::information(this,"Login","Username and password is incorrect");
         }
 
 
    }
 
 
 
 
}

#include "login.h"
#include "ui_login.h"
#include <QMessageBox>
#include <QPixmap>
#include <QFont>
#include <QSplashScreen>
#include <QTimer>

Login::Login(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::Login)
{
    ui->setupUi(this);
    QPixmap pix("C:/Users/Patch/Documents/COE113PROJ/Login/LOGINFORM/images/background.jpg");
    ui->background->setPixmap(pix);

    mydb = QSqlDatabase::addDatabase("QSQLITE");
    mydb.setDatabaseName("C:/Users/Patch/Documents/COE113PROJ/Login/LOGINFORM/sqlite/users.db");

    if(!mydb.open())
        ui->status->setText("Failed to open the database");

    else
        ui->status->setText("Connected Succesfuly");
}

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

void Login::on_pushButton_login_clicked()
{


    QString name,password;
    name=ui->lineEdit_Username->text();
    password=ui->lineEdit_Password->text();

    if(!mydb.isOpen()){

        qDebug()<<"Failed to open the database";
        return;
    }

    QSqlQuery qry;

    if(qry.exec("select * from users.db[ATTACH=CONFIG]11923[/ATTACH] where name='"+name+"'and password='"+password+"'"))
    {
        int count=0;
        while(qry.next())
        {
            count++;
        }
        if(count==1)
        {
            QMessageBox::information(this,"Login","Username and password is correct ");
            hide();
            secDiag = new SecDiag(this);
            secDiag->show();

        }

        if(count>1)
        {
            QMessageBox::information(this,"Login","Username and password is incorrect");
        }
        if(count<1)
        {
            QMessageBox::information(this,"Login","Username and password is incorrect");
         }


    }




}

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