Hi everybody. I'm creating a website and I try to use the liquid content on powerpage. I made a script that should say "Hi user.fullname" . Fullname should be different for everybody. It worked but since a few week, it write "Hi John Doe" for everybody, and of course we're not John Doe. Could somebody help me to see where I can find the variable user.fullname and so understand the problem ?
Thank's a lot, and sorry for my english

Here's the part of the code :
{% if user.logged_in %}
Hi {{ user.fullname }} <br /><br />
{% else %}
Welcome, Guest!<br /><br />
{% endif %}