If you have entered an email address for your account it is possible to reset your password and get a new one.
We will need the username (not the display name since that name is not unique. Though the display name and the username are often the same since that is the default behaviour during account creation).
If no email address is entered we can transfer the public information (item images, likes and fits status) from one account to a new account. You will loose all private information such as item descriptions, avatar image etc. Contact support to transfer the public information: firstname.lastname@example.org