I want to make a register function in firebase I'm new to it so I would appreciate any help. I found the firebase docs page and it says I can wether use it in the frontend or in the backend. In both ways I can use a function like this one:

import { getAuth, createUserWithEmailAndPassword } from "firebase/auth";

const auth = getAuth();
createUserWithEmailAndPassword(auth, email, password)
  .then((userCredential) => {
    // Signed in 
    const user = userCredential.user;
    // ...
  })

But this method only allows me to create it with email and password.

I want to be able to insert more values like name, phone, company, etc.

In the docs says I can use the admin SDK like so:

getAuth()
  .createUser({
    email: 'user@example.com',
    emailVerified: false,
    phoneNumber: '+11234567890',
    password: 'secretPassword',
    displayName: 'John Doe',
    photoURL: 'http://www.example.com/12345678/photo.png',
    disabled: false,
  })
  .then((userRecord) => {

But I don't know where to get the getAuth() method from.

I would appreciate your help a lot 😁