public MqttClient(IOptions <MqttClientOptions> options,
ILogger <MqttClient> logger = default)
{
_logger = logger ?? NullLogger <MqttClient> .Instance;
_group = new MultithreadEventLoopGroup();
_packetIdentifierProvider = new MqttPacketIdProvider();
_packetDispatcher = new MqttPacketDispatcher();
_options = options.Value;
}