I prepared this lecture to implement it as simply and quickly as possible, but I'm sorry I couldn't satisfy you with the socket part 😭😭 After all, the actual socket service does not immediately process incoming requests. You need a module that uses an event tool to process incoming messages and additionally coordinate rooms. However, it is too difficult to cover such parts in this lecture and the difficulty level of the lecture will increase, so I tried to implement it as simply as possible. Next time, I will come back with a lecture that will give you more satisfaction. Thank you!