public function __construct(LoopInterface $loop, Emitter $emitter, ClientInterface $httpClient = null)
{
$this->emitter = $emitter;
parent::__construct($loop, $httpClient);
}
public function __construct(LoopInterface $loop, $token, ClientInterface $httpClient = null)
{
parent::__construct($loop, $httpClient);
$this->setToken($token);
}