With any purchase, a default account is generated automatically to save your documents for later use. You can edit your account details either during the purchase process, or afterwards in your account settings.
If you forgot your password, simply click on ‘Forgot Password’ when logging in. After providing your user name, you will receive an email with a link containing a code to reset your password.
If this didn’t help, or if you have not yet activated your account with a username of your choice, please contact firstname.lastname@example.org.