Note: This app was built using the old usage token flow. That has been deprecated in favor of a new system using TTLs. See more details here and here. We've updated the app, but our more recent sample apps, like this one reflect more of what a modern implementation of Gabber would look like.
If you want to learn more about how to use the gabber-client-react library, you can check out the gabber-client-react repository, or the gabber-client-react documentation.
We also have a sample app walkthrough here