Thread:Project:Support desk/Help- changing ownership of wiki- change email and password?/reply

The maintenance script will allow you change the password. Then you can log into the account and also change the email address.

But if your predecessor is Dbrown, you probably shouldn't use that account. I assume that's his real name. You should instead assign the sysop and bureaucrat rights to Dlilly, and then if necessary remove them from your predecessor. Unfortunately, there doesn't seem to be a maintenance script for modifying rights of existing users, so you'd have to manually modify the on your database.