From Fedora Project Wiki
Edit your account
This is where you can edit your existing account in the Fedora Account System .
This form is similar to the Apply for a new account form. It allows you to update your account details. This is also where you can request membership in additional groups.
Updating Your Details
You can update most of your account details using this form. Simply change the parts that need updating and click 'Submit'. You do not need to re-enter your password or select your SSH key again unless you wish to change them.