Can't see session on Firebase Analytics on sample App

[douglasofreitas]

Hello team,

I follow the instructions to create new create react-natvie app and see this link bellow, but not work on mai firebase account.
https://rnfirebase.io/analytics/usage

Anyone know a recent app sample with analytics enable to me see it working?

One error that I see on my code:
No Firebase App [DEFAULT] has been created - call Firebase App.initializeApp()

But in the instructions don't have information about initializeApp and create config variable from google-services.json, for example.
I guess that initializeApp was automatic, but appears that don't occurs.

Can anyone help me with a recent sample code?
Thanks