With every product short description we have addthis sharing.com options for facebook , twitter etc.

Does it require any anything to link with Store Owner's facebook or no ?

I found this code in All Settings:

Products.AddThisSharing.Code  

<!-- AddThis Button BEGIN --> <a class="addthis_button" href="http://www.addthis.com/bookmark.php?v=250&amp;username=nopsolutions"><img src="http://s7.addthis.com/static/btn/v2/lg-share-en.gif" width="125" height="16" alt="Bookmark and Share" style="border:0"/></a><script type="text/javascript" src="http://s7.addthis.com/js/250/addthis_widget.js#username=nopsolutions"></script> <!-- AddThis Button END -->  

Should i change the username with Store Owner's username of addthis.com ?