Chances are that you haven't logged on in over 8 years, you can't remember your password and you probably aren't using the same email address you registered with.
If you're a member of the Discord group, then you can simply DM me on there with your new email address. I can then link that to your original account and you can then use the Forgot password link to do a standard password reset to your new email address.
If you're not a member of the Discord group,it will probably be easiest to create a new account on here and send me a PM with your details, although I will need some way to know you are definitely you! I can then do the same as above and delete the new account once you've logged into the original one successfully.