How can I UpdateUserProfile when signing up user, in Firebase-v9, with Typescript?

I'm trying to sign up user and then updateUserProfile with the so named function.

First I had a problem with the typeof user, which I solved by importing the User type from firebase and I do a check if there is a currentUser, to satisfy the null possibility.

I think the problem is with that last check, because the content of the function does not run. Namely I think the user is not yet signed up.

Note: if I do: const user: User = this.auth.currentUser;

I get in updateProfile(user) this error type 'User | null' is not assignable to type 'User'.

If I do: const user: User | null = this.auth.currentUser;

I get this error:

Argument of type 'User | null' is not assignable to parameter of type 'User'.

That's why I ended up checking like this:

if (this.auth.currentUser) {const user: User = this.auth.currentUser;

So how can I make this work?

An option could be to check onAuthStateChanged in home screen after signing up and then run updateUserProfile, where I would pass the name, which I would on sign up just save in redux.

In Firebase-v8 I could updateUserProfile just in createUserWithEmailAndPassword function.I'm sure there should be a way to do it also in v9, but with Typescript too.

Any help would be appreciated.

Thanks

import { createUserWithEmailAndPassword, getAuth, sendPasswordResetEmail, updateProfile, User } from 'firebase/auth';  async signUp(email: string, password: string, name: string) {    createUserWithEmailAndPassword(this.auth, email, password)      .then(async userCredential => {        console.log('userCredential', userCredential);        await this.updateUserProfile(name);      }).catch((error) => {        const errorCode = error.code;        const errorMessage = error.message;      })  }  async updateUserProfile(name: string) {    if (this.auth.currentUser) {      const user: User = this.auth.currentUser;      updateProfile((user), {        displayName: name, photoURL: `https://gravatar.com/avatar${md5(user.email)}?d=identicon`      }).then((user) => {        // Profile updated!        console.log('Profile updated!', user);      }).catch((error) => {        // An error occurred        console.log(error);      });    }  }