To be a member of the wiki, here in this page you can optionally add a page whose page id is your name. But having a page anywhere in the site does not require you to be a member. The only reason to be a member is to enjoy the SiteFeature. A page without owner is always allowed to be updated by the public.
It is good to have something about your public key or address in your page so that other people can communicate with you privately and safely. Do not post your personal credentials anywhere in the site and in your page.
This page is add-only to welcome any new comers.