I have a main site at http://www.iosbasics.com. Now I want to create a sub-domain with url http://www.answers.iosbasics.com so that users of my main website can raise specific queries there and get answered.
I want that my users don't have to login again at the subdomain if they are already logged into my main website (SSO). In other words, I want to share the same set of users across all sub-domains
Please advice what is the best way to go for this. I was going through WP Multisite documents but didn't get much help.