Authentication is an important part of any application, be it web-based, desktop, or mobile. Each kind of application has certain best practices when it comes to handling user authentication. In web-based applications, especially Software-as-a-Service (SaaS) based applications, this process is of utmost importance, as it acts as the thin red line between the application being secure and insecure.
To keep things simple and flexible, Flask, by default, does not provide any mechanism for authentication. It always has to be implemented by us, the developers, as per our requirements and the application's requirements.
Authenticating users for your application can be done in multiple ways. It can be a simple session-based implementation or a more secure approach using the Flask-Login extension. We can also implement authentication by integrating popular...