bugzilla - change of email address?

[Shao Zhang]

Recently, one of my email used for bugzilla is no longer available.
I would like to know how I can change my bugzilla account to a different 
email address. I don't see there is any settings that
allows me to do this on the web. I don't mind to create a new account, 
but then I would like to know how I can transfer the
bugs that reported by me to my new bugzilla account.