How can I convert the username to UPPERCASE in the authorization section?

Or how can I Authorize only the Username wittren in UPPERCASE?

Thanks

2013/4/19 Andres Gomez Ruiz <andres.gomez@urbalink.co>

Thanks a lot guys!

Both methods work. Finally I used the regex in the Authorize section.

Best regards.
Andrés

C. Andres