如何访问firebase auth userMetadata

我正在试图找到一种方法来访问本文中描述的creationTime和lastminintime documentation .

有没有在react钩子中使用它的例子?

我无法理解firebase文档的一般意义-它只是一页上的文字。我认为它是为那些凭直觉知道如何填空的人设计的。总的来说,如何做到这一点,我仍然感到困惑。

我可以访问验证用户电子邮件使用反应钩如下:

import React, { useState, useEffect, useContext, createContext } from "react";
import firebase  from "../firebase";
import {auth} from "../firebase";


const authContext = createContext();

// Provider wraps app and makes auth object available by useAuth().
export function ProvideAuth({ children }) {
  const auth = useProvideAuth();
  return <authContext.Provider value={auth}>{children}</authContext.Provider>;
}

// Hook to get the auth 
export const useAuth = () => {
  return useContext(authContext);
};

// Provider hook that creates auth state
function useProvideAuth() {
  const [user, setUser] = useState(null);
  
  
  const signin = (email, password) => {
    return firebase
      .auth()
      .signInWithEmailAndPassword(email, password)
      .then(response => {
        setUser(response.user);
        return response.user;
      });
  };

  const signup = (email, password) => {
    return firebase
      .auth()
      .createUserWithEmailAndPassword(email, password)
      .then(response => {
        setUser(response.user);
        return response.user;
      });
  };

  const signout = () => {
    return firebase
      .auth()
      .signOut()
      .then(() => {
        setUser(false);
      });
  };

  const sendPasswordResetEmail = email => {
    return firebase
      .auth()
      .sendPasswordResetEmail(email)
      .then(() => {
        return true;
      });
  };

  const confirmPasswordReset = (code, password) => {
    return firebase
      .auth()
      .confirmPasswordReset(code, password)
      .then(() => {
        return true;
      });
  };

  
  useEffect(() => {
    const unsubscribe = firebase.auth().onAuthStateChanged(user => {
      if (user) {
        setUser(user);
      } else {
        setUser(false);
      }
    });

    
    return () => unsubscribe();
  }, []);
  
  return {
    user,
    signin,
    signup,
    signout,
    sendPasswordResetEmail,
    confirmPasswordReset
  };
}

现在,我想弄清楚要访问所描述的字符串值需要做什么 here 或者描述的时间戳 here

我试过了(所有的猜测):

 {auth.user.UserMetadata().creationTime}

 {auth.user.creationTime}

 {auth.user.UserMetadata.creationTime}