public function sendMessage($message)
    {
        if ($payload = $this->getJsonPayload($message)) {
            $response = $this->getHttpClient()
                ->post($this->getWebhook(), [
                    'headers' => ['Content-Type' => 'application/json'],
                    'body' => $payload,
                ]);

            return 200 === $response->getStatusCode();
        }

        return false;
    }