Hey,
Try using the forget password feature. Make sure you have access to you email you used to register your server. If you still can't retrieve, reply and a staff member will get back to you. But try resetting the password by using the email you've previously used to register your server account with.
Also don't type "Help" as your thread topic name. Instead make it descriptive, e.g "Ican't log into my server panel." That way LEET support can easily identify your issue without actually pressing on your thread.