I login to lemmy.world using username/password. There is an email address associated with my account.
I just tried to login to mastodon.world using that email address and my existing lemmy.world password and it gives me a “Invalid E-mail address or password” error. Not entirely unexpected… Does this functionality exist? Is there something I’m doing wrong?
They’re separate servers hosted by the same admin group. The accounts are still separate though, no single sign-on. Make an additional mastodon.world (or pick another mastodon server, there’s no reason you HAVE use use the same one) if you want one.