编辑：能够修复问题是关键。我已经将我的应用程序上传到谷歌控制台，并在应用程序完整性下使用他们的Sha1密钥。

我是Unity和Firebase/GoogleSignin的新手。

• 试图在Unity中通过Firebase设置谷歌登录按钮。
• 使用Unity 2021.3.6f1，构建用于Android 6+，脚本后端：IL 2CPP，api每个平台的兼容性级别：.Net标准2.1，目标体系结构：ARMv7和ARM 64，非开发版本，Firebase项目设置Prod-Tag不是生产版本

我的脚步

• 使用playersettings中的包名创建了Unity firebase项目
• 下载google-services.json并添加到资产文件夹
• 下载（Firebase Unity SDK 9.3.0）FirebaseAuth.unitypackage和谷歌登录插件-1.0.4.unitypackage并将两者导入到Unity中（跳过谷歌登录插件的解析，从解析FirebaseAuth中删除net 3.5 unity.tasks.dll和unity.compat.dll）
• 启用身份验证-〉登录方法-〉google（来自google-services.json的Web客户端ID匹配）
• 使用Unity上的密钥库管理器生成密钥库（puplishing设置），使用java keytool读取SHA-256指纹并添加到firebase项目设置中。
• 已使用google-services.json中的WebClient ID OAuth客户端ID类型3
• 构建应用程序并安装在手机上，并抛出以下错误：

DeveloperError Exception of type 'Google.GoogleSignIn+SignInException' was thrown.

我的密码：

using UnityEngine;
using UnityEngine.UI;
using System;
using System.Collections;
using System.Collections.Generic;
using System.Threading.Tasks;
using Firebase;
using Firebase.Auth;
using Firebase.Extensions;
using Google;
using System.Net.Http;

public class FirebaseGoogleLogin : MonoBehaviour
{
    public Text warning;
    public Animator anWarning;
    private bool fireBaseReady;

    private GoogleSignInConfiguration configuration;
    Firebase.DependencyStatus dependencyStatus = Firebase.DependencyStatus.UnavailableOther;
    Firebase.Auth.FirebaseAuth auth;
    Firebase.Auth.FirebaseUser user;

    void Awake()
    {
        configuration = new GoogleSignInConfiguration
        {
            WebClientId = "XXX from google-services.json",
            RequestIdToken = true
        };
    }

    private void Start()
    {
        auth = Firebase.Auth.FirebaseAuth.DefaultInstance;
    }

    public void OnSignIn()
    {
        GoogleSignIn.Configuration = configuration;
        GoogleSignIn.Configuration.UseGameSignIn = false;
        GoogleSignIn.Configuration.RequestIdToken = true;
        GoogleSignIn.Configuration.RequestEmail = true;

        user = auth.CurrentUser;
        if (user != null)
        {
            warning.text = "User signed in successfully:" + user.Email + " " + user.UserId;
            anWarning.Play("Base Layer.FontButtonFadeLong", 0, 0);
        }
        else
        {
            GoogleSignIn.DefaultInstance.SignIn().ContinueWith(OnAuthenticationFinished);
        }
    }

    internal void OnAuthenticationFinished(Task<GoogleSignInUser> task) 
    {
        //TaskCompletionSource<FirebaseUser> signInCompleted = new TaskCompletionSource<FirebaseUser>();
        //signIn.ContinueWith(task => { 
            if (task.IsCanceled)
            {
                warning.text = "1:" + task.Exception;
                anWarning.Play("Base Layer.FontButtonFadeLong", 0, 0);
            }
            else if (task.IsFaulted)   //ERROR OCCURS HERE
            {
                using (IEnumerator<System.Exception> enumerator =
               task.Exception.InnerExceptions.GetEnumerator())
                {
                    if (enumerator.MoveNext())
                    {
                        GoogleSignIn.SignInException error =
                                (GoogleSignIn.SignInException)enumerator.Current;
                        warning.text = "Got Error: " + error.Status + " " + error.Message;
                        anWarning.Play("Base Layer.FontButtonFadeLong", 0, 0);
                    }
                    else
                    {
                    warning.text = "Got Unexpected Exception?!?" + task.Exception;
                    anWarning.Play("Base Layer.FontButtonFadeLong", 0, 0);
                    }
                }
            }
            else
            {
                warning.text = "3";
                anWarning.Play("Base Layer.FontButtonFadeLong", 0, 0);
                Credential credential = Firebase.Auth.GoogleAuthProvider.GetCredential(((Task<GoogleSignInUser>)task).Result.IdToken, null);
                auth.SignInWithCredentialAsync(credential).ContinueWith(authTask => {
                    if (authTask.IsCanceled)
                    {
                        warning.text = "auth task canceled:" + authTask.Exception;
                        anWarning.Play("Base Layer.FontButtonFadeLong", 0, 0);
                    }
                    else if (authTask.IsFaulted)
                    {
                        warning.text = "auth task is faulted:" + authTask.Exception;
                        anWarning.Play("Base Layer.FontButtonFadeLong", 0, 0);
                    }
                    else
                    {
                        warning.text = "User signed in successfully:";
                        anWarning.Play("Base Layer.FontButtonFadeLong", 0, 0);
                    }
                });
            }
       // });
    }
}

OnSignIn通过按下按钮启动。

错误发生在“internal void OnAuthenticationFinished(Task<GoogleSignInUser> task)”-〉“(task.IsFaulted)”处
我在FirebaseGoogleLogin.cs脚本旁边的Unity中没有控制台错误/构建错误：

Error CS0433: The type 'Task' exists in both 'Unity.Tasks, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null' and 'netstandard, Version=2.1.0.0, Culture=neutral, PublicKeyToken=XXX' Assembly-CSharp, Assembly-CSharp.Player

但是人们说这很普遍，应该不会有什么问题。
请经过吨小时的工作，这一点，谁能告诉我，我犯了什么错误？