If not, I'd just set a random, fictional email and use the email you associate with this account on a brand new one. Much easier and you keep access to this account should you ever need it. If you don't have an email linked or it's linked to Facebook, add an email. It's by far the most convenient and easy method
I haven't a clue if it's got an email attached, assuming that the email for the Facebook account is. I didn't even know the account existed, untill I missclicked logging in
Resetting accounts in iGP isn't possible, however you can have your account deleted by following the steps in this FAQ post - How to delete or reset account, FAQ
Deleting an account is permanent and cannot be undone, so Rhys' idea above may be suitable if you think you may use your account again in future.
