Authenticating and authorizing users securely in a Python PyQt desktop application

In this tutorial, we will explore how to implement user authentication and authorization securely in a Python desktop application using the PyQt framework. User authentication verifies the identity of users, while authorization determines their access level to specific features or data within the application.
Before we begin, make sure you have the following installed:
This code creates a simple PyQt application with a single button for logging in.
Now, let's create a login dialog that will be displayed when the user clicks the "Login" button. Add the following code to your script:
This code creates a basic login dialog with username, password fields, and a login button.
Now, let's integrate the login dialog with the main application. Update the MyApp class as follows:
This modification ensures that the login dialog is displayed when the "Login" button is clicked, and it prints a message when the login is successful or canceled.
Now that we have a basic authentication mechanism, let's implement a simple authorization system. For this example, we'll create a second window accessible only after a successful login.

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