How to modify the default username/password for freepbx

HI, everyone

I new installed a freepbx, I login freepbx use freepbx/fpbx. but this username/password is widely known , I want to modify the default freepbx/fpbx . who can help me?

From serverfault bruce

• http://www.freepbx.org/support/documentation/faq/changing-the-mysql-password

  From Sergey