To create a Issue Management System account, all you need to do is to enter a legitimate email address. You will receive an email at this address to confirm the creation of your account. You will not be able to log in until you receive the email. If it doesn't arrive within a reasonable amount of time, you may contact the maintainer of this Bugzilla installation at firstname.lastname@example.org.
If you already have an account and want to change your email address, you can change it from the Preferences page after logging in.
A user account is required to report new issues or to comment into existing ones, as you may be contacted for more information if needed. This also lets other users clearly identify who is the author of comments or changes made into issues. Note that your email address will never be displayed to logged out users. Only registered users will be able to see it.