Angular 8 /Firebase:使用邮箱和密码创建用户时如何设置displayName？

import { AngularFireAuth } from '@angular/fire/auth';

constructor(private afAuth: AngularFireAuth) {}

// 创建用户并设置displayName
createUserWithEmailAndPassword(email: string, password: string, displayName: string) {
  this.afAuth.createUserWithEmailAndPassword(email, password)
    .then((userCredential) => {
      const user = userCredential.user;
      user.updateProfile({
        displayName: displayName
      }).then(() => {
        console.log('displayName设置成功');
      }).catch((error) => {
        console.log('displayName设置失败：', error);
      });
    })
    .catch((error) => {
      console.log('用户创建失败：', error);
    });
}

// 登录用户并设置displayName
signInWithEmailAndPassword(email: string, password: string, displayName: string) {
  this.afAuth.signInWithEmailAndPassword(email, password)
    .then((userCredential) => {
      const user = userCredential.user;
      user.updateProfile({
        displayName: displayName
      }).then(() => {
        console.log('displayName设置成功');
      }).catch((error) => {
        console.log('displayName设置失败：', error);
      });
    })
    .catch((error) => {
      console.log('用户登录失败：', error);
    });
}