assistant socket fixed

src/controller/room/assistant.js

@@ -95,7 +95,7 @@ export class RoomAssistant {
     }
     if (!isJoinRoom) {
       logger.info("加入房间 :", { userId, roomId, user });
-      socket.join(roomId);
+      this.socket.join(roomId);
       const AllRoomUsers = await getAllRoomUsers(roomId);
       const roomConfig = await getRoomConfig(roomId);
       this.socket.broadcast.emit(EVENT.roomIn, {