On signing up you receive a verification email: you will need to respond to this before you can login. It's the same again if you reset a forgotten password.
Hoobedoo does not retain a copy of the email address you use to sign up - and cannot recover it for you should you forget.
If you share personal information publicly on hoobedoo then it may be possible to use this to identify you.
However your profile on hoobedoo is otherwise anonymous. You can share information privately if you wish, or not share it at all.