forgotten username

Hi,

This is embarrassing, but after a month of not playing, I forgot my account name. I registered my email but to send me my password it requires that I enter my username which I forgot. Help!

In fact I think I remember my password becos i have to enter that whereas my username was default so i didn't enter it much and thus forgot

Is there any way to retrieve my account name from my registered email? Thank you!

Edit: After much trial and error, I finally remembered it, thanks!