Needs usage documentation to indicate that it can take an optional argument
I noted that the User Twitter usertag template is protected, but it lacks documentation on its usage. When someone sees the page, one could get the false impression that it doesn't take an optional argument, until one examines the protected source and sees the several instances of {{{1|}}}.
I made the Usage documentation for the User YouTube Account usertag and would also like to do similar documentation for User Twitter and other usertag templates lacking such, but seem unable to do so when their sources are locked/protected. --SilSinn (Pokémon Sun TID: 768426; Pokémon Ultra Moon TID: 123446) (talk) 21:04, 25 November 2018 (UTC)