为什么我无法将Firebase电子邮件密码登录链接到Google登录? [英] Why can't I link firebase email-password sign-in to google sign-in?

问题描述

我已经在我的帐户中成功实现了 Firebase Google登录android应用程序，它可以正常工作.但是，我希望用户也使用电子邮件和密码登录应用程序.因此，我按照本教程将google登录与电子邮件密码登录.但是，当我尝试使用以下代码登录电子邮件密码时:

I have successfully implemented Firebase Google Sign-In in my android app and it works fine. But, I want the users to login into the app using email and password also. So, I followed this tutorial to link the google sign-in with email-password sign-in. But, when I try to sign-in with email-password with the following code:

firebaseAuth.signInWithEmailAndPassword(email, password)
   .addOnCompleteListener(new OnCompleteListener<AuthResult>()
   {
      @Override
      public void onComplete(@NonNull Task<AuthResult> task)
      {
         if (task.isSuccessful())
         {
             //code to link accounts
         }
         else
         {
             Toast.makeText(context, "SIgn In Error", Toast.LENGTH_SHORT).show();
             System.out.println("SIGN IN: " +  task.getException());
         }
      }
  });

它显示了例外情况:

com.google.firebase.auth.FirebaseAuthInvalidCredentialsException: The password is invalid or the user does not have a password.

代码有什么问题?

推荐答案

从错误消息中看来，您正在为尚未创建的用户调用 signInWithEmailAndPassword .

From the error message it seems like you're calling signInWithEmailAndPassword for a user that was not created yet.

您只能调用 signInWithEmailAndPassword(电子邮件，密码)登录以前使用 createUserWithEmailAndPassword(电子邮件，密码)创建的用户.您明确不能使用它登录以前仅使用其他身份提供商(例如Google登录)登录/创建的用户.

You can only call signInWithEmailAndPassword(email, password) to sign in a user that was previous created with createUserWithEmailAndPassword(email, password). You explicitly can't use it to sign in a user that was previous only signed in/created with another identity provider, such as Google sign-in.

如果您希望允许通过Google登录的同一用户也使用您的应用专用密码登录，则还需要创建这些辅助凭据，然后创建

If you want to allow the same user who signed in through Google, to also sign in with a password that is specific to your app, you will need to also create those secondary credentials, and then link the two providers (Google + Email/Password).

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