validateLogin example

        $usedContextToken = (string) $request->headers->get(PlatformRequest::HEADER_CONTEXT_TOKEN);
        $contextServiceParameters = new SalesChannelContextServiceParameters(
            (string) $request->attributes->get(PlatformRequest::ATTRIBUTE_SALES_CHANNEL_ID),
            $usedContextToken,
            $request->headers->get(PlatformRequest::HEADER_LANGUAGE_ID),
            $request->attributes->get(SalesChannelRequest::ATTRIBUTE_DOMAIN_CURRENCY_ID),
            $request->attributes->get(SalesChannelRequest::ATTRIBUTE_DOMAIN_ID)
        );
        $context = $this->contextService->get($contextServiceParameters);

        // Validate if a customer login is required for the current request         $this->validateLogin($request, $context);

        // Update attributes and headers of the current request         $request->attributes->set(PlatformRequest::ATTRIBUTE_CONTEXT_OBJECT, $context->getContext());
        $request->attributes->set(PlatformRequest::ATTRIBUTE_SALES_CHANNEL_CONTEXT_OBJECT, $context);
        $request->headers->set(PlatformRequest::HEADER_CONTEXT_TOKEN, $context->getToken());

        $this->eventDispatcher->dispatch(
            new SalesChannelContextResolvedEvent($context, $usedContextToken)
        );
    }