Connecter l'application avec firebase (How do you sign up for a Firebase account?)

comment connecter l'application a firebase pour pouvoir suivre les utilisateurs ?

Track the user ?

voir les personnes qui sont enregistrés

What you hope to do is still not clear.

Perhaps something like this is what you want to do?

How to broadcast a GPS location and share the information on a map with others in real time..CloudDB . The tutorial uses a CloudDB but you could use similar code with a FirebaseDB.

If that is not true, please explain what you expect to do with an example or using different words.

je veux retrouver les données dans firebase mais comment lié firebase à mon application, est ce qu'il faut télécharger firebase et ouvrir un compte ?

This discussion may show you how to use Firebase with App Inventor and get an account for Firebase.

and additional advice:

Y a t-il d'autres exemples de comment utiliser firebase ?

What do you want to do ?

connecter l'application avec firebase

The information and links provided above should tell you everything you need to know.

Perhaps start with the native experimental Firebase component.