Template:USERNAME
From Brickipedia, the LEGO Wiki
<insert name here>
Displays the username of the user viewing the page.
If the user is not logged in, then the template will display <insert name here>. You can control this by adding a parameter to the template with a value of the default text. For example, {{USERNAME|brick}} outputs "brick" if the user is not logged in.
Please use this template sparingly.