scriptcasers.slack.com

Not sure how to register for this. I can find the team. I can create a new team. I can find other teams that I belong to - and login to those.

You enter on the link and signin with the email and password you wish

Tried a password reset and get this:
[SIZE=17px]You asked us to send you a password reset link for[/SIZE]scriptcasers.slack.com[SIZE=17px]. However, this email address isn’t currently associated with that team.[/SIZE]

Sorry, my fail:
You can get an invitation here https://goo.gl/forms/3My7k3Rv4c8ylgW52