public function getWebClient() {
        if ($this->objClient == null) {
            $this->objClient = new Client();

            $objWssePlugin = $this->generateWSSEHeader($this->strUsername, $this->strApiToken);
            $this->objClient->addSubscriber($objWssePlugin);
            $this->objClient->setSslVerification(false);
        }
        return $this->objClient;
    }