I filled in the following form to be included in the Sitecore Chat on Slack:
https://docs.google.com/forms/d/1bAVDgP5-FhFh8ohPchHtifq-rz7EBkuPojAzdEofJyo/viewform
What are the next steps after that? If I go to http://sitecorechat.slack.com, it asks me for an username and a password, which I haven't been provided with yet.