Login_QT_Creator: Creation of login using QT_Creator and C++

This form allows the user to enter their name and password, if they are correct, it will display a message to you that they are correct otherwise not.

Steps:

• open the QT creator software ->Sélectionnez `Application` -> `Qt Widgets Application`.-> new project -> enter the project name"name-projet"
• open Mainwindow.ui ->
• Add the following to the main window:
1. -Two `QLabel` for the "Username" and "Password" labels.
2. -Two `QLineEdit` for username and password input fields.
3. -A `QPushButton` for the login button.
• open file mainwindow.cpp
• #include QMessageBox
• put the code
• Run the code