React SPA integration with https://github.com/Kyon147/laravel-shopify package.
This is the final code after following all the steps i described in this article https://softopia.in/how-to-create-a-shopify-app-with-laravel-shopify-package-and-react-spa/
Note: If you want to use billable middleware, don't forget to update the package's Billable middleware file as described in blog post. This will be an optional step if the package adds billing support fot SPA.