vertx / io.vertx.rxjava.mqtt / MqttEndpoint / reject

# reject

`open fun reject(returnCode: MqttConnectReturnCode): MqttEndpoint`

Sends the CONNACK message to the remote MQTT client rejecting the connection request with specified return code. See `io.vertx.rxjava.mqtt.MqttEndpoint#accept` for accepting connection

### Parameters

`returnCode` - the connect return code

Return
a reference to this, so the API can be used fluently