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.
https://appinventor.mit.edu/explore/ai2/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.