This is the official Mastodon community, yet there’s currently no way to connect a forum account to a Mastodon identity. The profile has a Website field, but no place for a Mastodon handle. Many of us are here because of our Mastodon accounts, and it’s often useful to know who you’re actually talking to in the fediverse — e.g. to follow someone after a good thread, or to recognise a maintainer or admin.
Proposal:
Add a custom user field “Mastodon” (Admin → Customize → User Fields) that accepts a handle like @user@instance.tld or a profile URL, shown on the profile card and user page. This would already cover the main use case.