code: public function setDomain(string $shopDomain)
      {
          $this->fixLifetime();
          Session::put(self::DOMAIN, $shopDomain);
      }
docs: Sets the Shopify domain to session.
  `expire_on_close` must be set to avoid issue of cookies being deleted too early.
  
  @param string $shopDomain The Shopify domain.
  
  @return void