How to make Laravel Sanctum (SPA) with Vue cli Private channel Broadcasting using Websocket ?

First you must learn about Laravel Echo. And you should also watch videos in this playlist: https://www.youtube.com/playlist?list=PL1TrjkMQ8UbWfFUCimQ50CdrR_J7QvEFW

From this playlist you will learn how to create chat app using Laravel Echo, Laravel Websockets and Vue.js