Update the Flutter wishlist app to use Auth0 authentication so that the user has to log in and the app accesses a secured API.

This is the third and final article in a series that guides you through the process of creating a “wishlist” mobile application using the Flutter SDK. The wishlist contains items that the user would like to someday own, storing each item’s name, description, and URL. The mobile app provides the user interface and communicates with a back-end application, which stores the list and provides an API to perform CRUD operations on it. The initial version of the app simply provides a functioning wishlist, while the final version incorporates Auth0 authentication to allow only authorized users to use the app as well as to use a secure API.

Note: This article builds on material and code from the two previous articles in this series, Build a Flutter Wishlist App, Part 1: Introducing Flutter and Building a Basic Wishlist App and Build a Flutter Wishlist App, Part 2: Adding CRUD Functionality to Your App.

The Current State of the App

At this point, you have a fully functional wishlist app. It stores and displays the items on your wishlist. It also allows you to add items to the list, edit items in the list, and delete items from the list.

The problem is that the app isn’t secure. It doesn’t require the user to log in, and its API is openly accessible. It’s all too easy for an unauthorized party to see, alter, or erase the contents of the wishlist.

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