How to query the Firebase Auth table in FireStore?

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Firebase Auth and Firestore are two different services provided by Firebase. Firebase Auth is a service that provides authentication for your Firebase project while Firestore is a NoSQL database that stores data in documents and collections.

Firebase Auth doesn't have a table in Firestore, but it is possible to access the user's data in Firestore when they sign up or sign in to your application. Here's how:

1. After a user signs up or signs in, retrieve their UID from Firebase Auth.
2. Create a Firestore document with the UID as the document ID.
3. Set the user's data as fields in the Firestore document.
4. To query the user's data, use the Firestore SDK to get the document with the user's UID.

Here's some sample code that shows how to retrieve a user's data from Firestore:

// Get the current user
const currentUser = firebase.auth().currentUser;

// Get the user document from Firestore
const userDoc = await firebase.firestore().collection('users').doc(currentUser.uid).get();

// Get the user data from the Firestore document
const userData = userDoc.data();

In the above code, we first get the current user from Firebase Auth. We then use the user's UID to get their document from the "users" collection in Firestore. Finally, we get the user's data from the Firestore document using the data() method.