How to call updateProfile() after creating User

June 7, 2022

I am trying to set the .displayName property of a user, right after it is created.

The Problem:
The user needs some time to get created, so it would not work to use .updateProfile() right after calling .createUserWithEmailAndPassword(). So how can I eventually update the .displayName right after the creation?

Right now I am trying this way:

export function signup(currentUser, email, password) {
    createUserWithEmailAndPassword(auth, email, password)
    updateProfile(currentUser, {displayName : "some name"})   
}

When I am calling the function I use this function for the value of currentUser

export function useAuth() {
    const [ currentUser, setCurrentUser ] = useState();

    useEffect(() => {
        const unsub = onAuthStateChanged(auth, user => setCurrentUser(user));
        return unsub; // Cleaning Function
    }, [])

    return currentUser;
}

>Solution :

Both the createUserWithEmailAndPassword() and updateProfile() methods are asynchronous and return a Promise. Therefore you either need to chain the Promises or use async/await as mentioned by Scott in his comment.

1/ Chain the Promises

export function signup(currentUser, email, password) {
    createUserWithEmailAndPassword(auth, email, password)
    .then(userCredential => {
       updateProfile(userCredential.user, {displayName : "some name"})   
    })
}

2/ Use async/await

export async function signup(currentUser, email, password) {
    const userCredential = await createUserWithEmailAndPassword(auth, email, password);
    await updateProfile(userCredential.user, {displayName : "some name"})   
}