public function onRequestBeforeSend(Event $e)
{
/** @var RequestInterface $request */
$request = $e['request'];
$url = $request->getUrl(true)->setScheme('https')->setHost(sprintf(self::BASE_URL, $this->username))->setPath(self::WEBHOOK_PATH);
$request->setUrl($url)->getQuery()->add('token', $this->token);
}