Magento 2.3 How to add customer login function for my existing Observer?

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Following are the code show Premium or Non-Premium along with product name using observer,

<?php
namespace Gta\CustomerMsgPdp\Observer\Product;
use Magento\Framework\Event\Observer;
use Magento\Framework\Event\ObserverInterface;
class Data implements ObserverInterface
    {
        /**
         * Below is the method that will fire whenever the event runs!
         *
         * @param Observer $observer
         */
        public function execute(Observer $observer)
        {
            $product = $observer->getProduct();
            $originalName = $product->getName();
            $price = $product->getPrice();

            if($price >= '50')
            {
                $modifiedName = $originalName . ' - Premium Products';
            }
            elseif($price <= '50')
            {
                $modifiedName = $originalName . ' - Non Premium Products';
            }

            // $modifiedName = $originalName . ' - Modified by Magento 2 Events and Observers';
            $product->setName($modifiedName);
        }
    }

I want to add another observer to check if customer logged-in or not if customer logged-in then only show wheater it is premium or non-premium products.