Arduino(ESP8266) to laravel websocket channel subscription problem - laravel

Question

i'm working on an IoT project which needs to connect to a laravel based socket server.
on laravel side all things are working just as should be but the problem is in arduino side which is a ESP8266 module being program by Arduino IDE.
i want to use Links2004/arduinoWebSockets library to connect to server.
it connects but i can't determine on which channel it should be.
is there any way on this library to tell the channel device should be on?
I gratefully appreciate any help :)
Arduino Test Code:
/*
Esp8266 Websockets Client
This sketch:
1. Connects to a WiFi network
2. Connects to a Websockets server
3. Sends the websockets server a message ("Hello Server")
4. Prints all incoming messages while the connection is open
Hardware:
For this sketch you only need an ESP8266 board.
Created 15/02/2019
By Gil Maimon
https://github.com/gilmaimon/ArduinoWebsockets
*/
#include <ArduinoWebsockets.h>
#include <ESP8266WiFi.h>
const char* ssid = "****"; //Enter SSID
const char* password = "******"; //Enter Password
const char* websockets_server_host = "xxx.xxx.xxx.xxx"; //Enter server adress -- serverip_or_name
const uint16_t websockets_server_port = 6001; // Enter server port
bool connected;
using namespace websockets;
WebsocketsClient client;
void setup() {
Serial.begin(115200);
// Connect to wifi
WiFi.begin(ssid, password);
// Wait some time to connect to wifi
for(int i = 0; i < 10 && WiFi.status() != WL_CONNECTED; i++) {
Serial.print(".");
delay(1000);
}
// Check if connected to wifi
if(WiFi.status() != WL_CONNECTED) {
Serial.println("No Wifi!");
return;
}
Serial.println("Connected to Wifi, Connecting to server.");
// try to connect to Websockets server
connected = client.connect(websockets_server_host, websockets_server_port, "/app/ab_key");
if(connected) {
Serial.println("Connecetd!");
client.send("Hello Server");
} else {
Serial.println("Not Connected!");
}
// run callback when messages are received
client.onMessage([&](WebsocketsMessage message) {
Serial.print("Got Message: ");
Serial.println(message.data());
});
}
void loop() {
if(connected) {
Serial.println("Connecetd!");
client.send("Hello Server");
} else {
connected = client.connect(websockets_server_host, websockets_server_port, "/app/ab_key");
Serial.println("try!");
}
// let the websockets client check for incoming messages
if(client.available()) {
client.poll();
}
delay(500);
}
terminal view of laravel websocket: laravel websocket