Authentication from a React app

We have a React.js app that already has a sign/login system. We’re looking to join modular feature built in Bubble to the core React app. We want to make sure that this Bubble module is accessible only if the user has been authenticated.

When a user logs into our React.js app, their authentication credentials (e.g., JWT token) are stored in a session cookie. How would I go about verifying the session cookie in Bubble?

Any suggestion on the best approach to doing this?