custom controller name in CakePHP

[ThomasSR]

I am developing an application in cakephp, I have to provide a user page for each user in the site like www.example.com/username, username will changes for each user, when a visitor comes to this url he gets details of the user with that particular username, but in cake username tries to get the controller with that name, How can I done this ? is there anyway to solve this issue Thanks a lot