Migrate Authentication From a Plain React App to a Gatsby App

Sometimes you need to protect some pages on your website and only shown to logged-in users. You can achieve this in Gatsby using a combination of client-only routes or Gatsby "Dynamic" Pages and reach router.

It becomes easier if you have already authentication in your plain react app and want to move it to Gatsby. In this lesson, you will learn how to reuse the authentication code you have in your existing plain React app in your Gatsby App