Put it all together - Login with single platform auth - (Unreal Engine module)

Last updated on May 27, 2025

Connect the UI to let player log in with single platform auth​

In this tutorial, you will learn how to connect the SinglePlatformAuthWidget_Starter class with the AuthEssentialsSubsystem_Starter subsystem to handle the single platform auth login process.

  1. Open the SinglePlatformAuthWidget_Starter C++ class and ensure that your class has the following highlighted code in the NativeOnActivated() function.

    void USinglePlatformAuthWidget_Starter::NativeOnActivated()
    {
    // ...
    	if (ShouldAutoLogin())
    	{
    		OnLoginWithSinglePlatformAuthButtonClicked();
    		return;
    	}

    	const FString LoginButtonText = TEXT_LOGIN_WITH.ToString().Replace(TEXT("%PLATFORM%"), *GetDefaultNativePlatform());
    	Btn_LoginWithSinglePlatformAuth->SetButtonText(FText::FromString(LoginButtonText));
    	Btn_LoginWithSinglePlatformAuth->OnClicked().AddUObject(this, &ThisClass::OnLoginWithSinglePlatformAuthButtonClicked);
    	LoginWidget->SetButtonLoginVisibility(ShouldDisplayDeviceIdLogin() ? ESlateVisibility::Visible : ESlateVisibility::Collapsed);
    }

  2. In the same class, add the following highlighted code to the OnLoginWithSinglePlatformAuthButtonClicked() function.

    void USinglePlatformAuthWidget_Starter::OnLoginWithSinglePlatformAuthButtonClicked()
    {
    	// Set the login widget to logging in state and bind the retry login delegate.
    	LoginWidget->SetLoginState(ELoginState::LoggingIn);
    	LoginWidget->OnRetryLoginDelegate.AddUObject(this, &ThisClass::OnLoginWithSinglePlatformAuthButtonClicked);

    	// Login with single platform auth is considered as login with default native platform.
    	// Thus, it doesn't need username, token, nor the login method.
    	AuthSubsystem->SetAuthCredentials(EAccelByteLoginType::None, TEXT(""), TEXT(""));
    	AuthSubsystem->Login(GetOwningPlayer(), FAuthOnLoginCompleteDelegate::CreateUObject(LoginWidget, &std::remove_pointer_t<decltype(LoginWidget)>::OnLoginComplete));
    }

Resources​

Last updated on
On this page