Here's my JS code:

import { ref } from "vue"
import { projectAuth } from '../firebase/config'
import { getAuth, createUserWithEmailAndPassword, updateProfile } from 'firebase/auth'

const error = ref(null)
const isPending = ref(false)

const signup = async(email, password, displayName) => {
    error.value = null
    isPending.value = true

    try {
        const res = createUserWithEmailAndPassword(projectAuth, email, password)
        console.log(projectAuth.currentUser)

        if (!res) {
            console.log('Could not complete the signup')
            throw new Error('Could not complete the signup')
        }

        console.log(projectAuth.currentUser)
        await updateProfile(projectAuth.currentUser, {displayName})        
        error.value = null
        isPending.value = false

        return res
        
    } catch(err) {
        console.log('ERROR: ' + err.message)
        error.value = err.message
        isPending.value = false
    }
}

const useSignup = () => {
    return {error, signup, isPending}
}

export default useSignup

My Vue3 application is calling the signup function in this script whenever a user is signing up. The createUserWithEmailAndPassword function is successful and the user shows up in firebase. But I want to also add a display name to my user, so I'm trying to use the updateProfile function to do that but there's a problem.

The problem is the projectAuth.currentUser is null even after creating the user and I can't figure out why??