Ionic 3属性“密码”在“用户”类型上不存在

Question

我需要我无法弄清楚的这种奇怪状况的帮助，我一直在获取“用户”类型上不存在属性“密码”。即使，我在user.ts类上将密码声明为字符串

user.ts

    export interface User{
    email: string;

    password: string;
}

我的注册页面

<ion-content padding>
<ion-item>
    <ion-label floating>Email</ion-label>
    <ion-input type="text" [(ngModel)]="user.email"></ion-input>
  </ion-item>

      <ion-item>
      <ion-label floating>Password</ion-label>
      <ion-input type="password" [(ngModel)]="user.password"></ion-input>
    </ion-item>

    <button ion-button block (click)="register(user)">Cadastrar</button>

我的register.ts

import { Component } from '@angular/core';
import { IonicPage, NavController, NavParams} from 'ionic-angular';
import { User } from 'firebase/app';
import { AngularFireAuth } from "angularfire2/auth";

@IonicPage()
@Component({
  selector: 'page-cadastro',
  templateUrl: 'cadastro.html',
})
export class CadastroPage {

  user = {} as User;

  constructor(
    public navCtrl: NavController, public navParams: NavParams,
    private afAuth: AngularFireAuth

  ) {
  }

  ionViewDidLoad() {
    console.log('ionViewDidLoad CadastroPage');
  }
  async register(user: User){
    try{
    const result = await this.afAuth.auth.createUserWithEmailAndPassword(user.email, user.password);
    console.log(result);
    }
    catch(e){
      console.error(e);
    }
  }

}