Problème avec les QInput Dialog de Qt

#ifndef FENIDENTIFICATION_H
#define FENIDENTIFICATION_H

#include <QApplication>
#include <QWidget>
#include <QInputDialog>
class FenIdentification : public QWidget // création classe héritant QWidget
{
    Q_OBJECT
public:
    FenIdentification();

private:

};

#endif // FENIDENTIFICATION_H

#include "fenidentification.h"

FenIdentification::FenIdentification() : QWidget()
{
    bool ok = false;

    QString identifiant = QInputDialog::getText(this, "Identification", "Identifiant:", QlineEdit::Normal, QString(), &ok);

    if(ok && identifiant = "0000")
    {
        bool okMDP = false;
        QString motDePasse = QinputDialog::getText(this, "Identification", "Mot de passe:", QLineEdit::Password, QString(), &okMDP);

        if(okMDP && motDePasse = "0000")
        {
            QMessageBox::information(this, "Identification", "Content de vous revoir" + identifiant);
        }
    }
}