public function createServiceClient($serviceName, $isFeedback = false)
    {
        $serviceUrl = $this->getServiceURL($serviceName, $isFeedback);

        $clientClass = sprintf(
            'Zbox\UnifiedPush\NotificationService\%s\%s',
            $serviceName,
            $isFeedback ? 'ServiceFeedbackClient' : 'ServiceClient'
        );

        $credentials        = $this->credentialsFactory->getCredentialsByService($serviceName);
        $clientConnection   = new $clientClass($serviceUrl, $credentials);

        return $clientConnection;
    }