Javascript 如何修改此PolymerFire/Firebase教程以使用电子邮件/密码登录而不是google帐户？

我想修改此Notes应用程序以使用电子邮件/密码登录，而不是使用google帐户：

我用这个：

<firebase-auth id="auth" user="{{user}}" on-error="_loginError"></firebase-auth>
<paper-dialog id="authDialog" modal with-backdrop>
  <paper-input label="Email" value="{{signinEmail}}"></paper-input>
  <paper-input label="Password" value="{{signinPassword}}" type="password"></paper-input>
  <div class="buttons">
    <paper-button on-click="_signIn" raised>Sign in</paper-button>
  </div>
</paper-dialog>

---

但首先，您需要从firebase控制台启用电子邮件密码身份验证方法，以便能够使用电子邮件密码身份验证。

如果您现在才开始，最好使用最新版本，如Polymer 3。。但是如果你真的想要聚合物1。。你试过什么吗？你有什么问题？

    /**
     * Authenticates a Firebase client using an email / password combination.
     *
     * @param  {!String} email Email address corresponding to the user account.
     * @param  {!String} password Password corresponding to the user account.
     * @return {Promise} Promise that handles success and failure.
     */
    signInWithEmailAndPassword: function(email, password) {
      return this._handleSignIn(this.auth.signInWithEmailAndPassword(email, password));
    },

<firebase-auth id="auth" user="{{user}}" on-error="_loginError"></firebase-auth>
<paper-dialog id="authDialog" modal with-backdrop>
  <paper-input label="Email" value="{{signinEmail}}"></paper-input>
  <paper-input label="Password" value="{{signinPassword}}" type="password"></paper-input>
  <div class="buttons">
    <paper-button on-click="_signIn" raised>Sign in</paper-button>
  </div>
</paper-dialog>

  _signIn: function() {
    this.$.auth.signInWithEmailAndPassword(this.signinEmail, this.signinPassword)
      .then(function(response) {
        console.log(response);
      }.bind(this), function(error) {
        this.$.toast.show({text: '' + error});
      }.bind(this))
      .catch(function(error) {
        this.$.toast.show({text: '' + error});
      }.bind(this));
  },