I'm using Firebase Authentication to authenticate users on my website with two methods: email/password and Google OAuth login.

Whenever a user registers via the email/password method, I use the following code to save the information they entered in the Cloud Firestore document:

createUserWithEmailAndPassword(auth, email, password)
        .then((userCredential) => {
            const user = userCredential.user;
            setDoc(doc(db,"accounts",user.uid), {
                user_id: user.uid,
                first_name: first_name,
                last_name: last_name,
                date_of_birth: dob,
                email: email,
                password: password,
                date_created: date
            })
        })
        .catch((error) => {
            //pass
        };

However, I don't know how to do the same thing when they log in with Google (I'm using the redirect method): I want to extract the user data from their Google account (generally, just their name , date of birth and their Gmail address). I've looked through the documentation for the getRedirectResult() method but I'm not sure how to proceed.

I need help with some basic code to pull this data after they register.

Thanks for any help as I've been going crazy with this for the past two days.