If you cannot remember your password, you can easily set a new one up.
Go to dynotag.com and enter your email address but leave the password field blank. Note that there is a “Forgot your password?” link at the bottom… Clicking that link will send an email to you with a recovery link, that will help you sign back in.
Once signed in, do visit “My Account” page and assign yourself a new password.
Note: Make sure you are receiving emails from sender “firstname.lastname@example.org” by entering it in your email system address book so assistance message(s) do not go into your SPAM folder or get rejected…