This blog was originally published on Descope . Adding authentication in Flask is a key step in building secure web apps that users can trust. In this hands-on tutorial, you'll see how to create a complete Flask authentication flow using Python and simple HTML templates. We'll walk through signup, login, logout, and profile features with clear examples that you can use in your own projects. Whether you're just getting started with Flask or want to level up your app's security, this guide will help you build a solid foundation for user authentication. Prerequisites and setup Before diving into Flask authentication, make sure you have the basics ready. All the code for this tutorial is available in our GitHub repository , with installation instructions in the README. If you're new to Flask or Descope, no problem. You can follow along as you build authentication in Flask from scratch. To get started, sign up for a free account on Descope.…