Google使用firebase登录iOS会出现400错误

Question

我正在尝试为iOS实施Google登录，我按照https://firebase.google.com/docs/auth/ios/google-signin上提到的所有步骤设置Google登录，但是当我收到GIDSignInDelegate回拨

时

- (void)signIn:(GIDSignIn *)signIn didSignInForUser:(GIDGoogleUser *)user withError:(NSError *)error 

我将HTTP错误代码设置为400，用户对象为nil，描述为

Error data:
{
    error = "invalid_grant";
    "error_description" = "verifier does not match.";
}

我的代码非常简单，只是实现了Google登录按钮，我的View控制器实现了GIDSignInDelegate。

演示代码：

In AppDelegate.m

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {

    [FIRApp configure];
    [GIDSignIn sharedInstance].clientID = [FIRApp defaultApp].options.clientID;

    PBLoginSignupUserViewController *loginSignupVC = [[PBLoginSignupUserViewController alloc] init];
    UINavigationController *navController = [[UINavigationController alloc] initWithRootViewController:loginSignupVC];
    self.window.rootViewController = navController;
    return YES;
}

- (BOOL)application:(UIApplication *)app openURL:(NSURL *)url options:(NSDictionary<UIApplicationOpenURLOptionsKey,id> *)options {
    return [[GIDSignIn sharedInstance] handleURL:url sourceApplication:options[UIApplicationOpenURLOptionsSourceApplicationKey] annotation:options[UIApplicationOpenURLOptionsAnnotationKey]];
}

In MyViewController.m <GIDSignInUIDelegate, GIDSignInDelegate>

- (void)signIn:(GIDSignIn *)signIn didSignInForUser:(GIDGoogleUser *)user withError:(NSError *)error {
    // GETTING ERROR HERE, AND nil AS USER OBJECT

    if(!error){
        GIDAuthentication *authentication = user.authentication;
        FIRAuthCredential *credential = [FIRGoogleAuthProvider credentialWithIDToken:authentication.idToken
                                                                         accessToken:authentication.accessToken];
    } else {
        // show toast for error
    }
}