PresenceChannel onJoin fails if Authentication got status 502 because of timeout

[QubeX2]

PresenceChannel onJoin fails if Authentication got 502 because of timeout
If authentication gets status 502 because of to many requests at the same time

To Reproduce
Make a page, join a presence channel, open 40 tabs in a webbrowser, when timeouts starts happening close all.

Expected behavior
laravel-echo-server shouldn't crash

Additional context
if(this.io.sockets.connected && this.io.sockets.connected[socket.id])

solves it when I tested it