Wiktionary has a user page for User Wiktionary 2.

If you'd like to advertise that you also have a Wiktionary account, place the following code on your page:
((User WTUP)) Or, if you'd like to hardcode the username (for instance, if the userbox will be on a subpage of your userspace), you can type in either
((User WTUP|UserNameHere)) or
((User WTUP|user=UserNameHere))

See also

• ((User Wiktionary))