angularfire验证邮件是否正在使用的auth函数

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

@Component({
  selector: 'app-auth',
  templateUrl: './auth.component.html',
  styleUrls: ['./auth.component.css']
})
export class AuthComponent {
  constructor(private afAuth: AngularFireAuth) {}

  checkEmailAvailability(email: string): void {
    this.afAuth.auth.fetchSignInMethodsForEmail(email)
      .then((signInMethods: string[]) => {
        if (signInMethods.length === 0) {
          console.log('Email is available.');
        } else {
          console.log('Email is already in use.');
        }
      })
      .catch((error: any) => {
        console.log('Error occurred while checking email availability:', error);
      });
  }
}