[GTALUG] My attempt to log into the TLUG talk website

I don't know if this is the right venue for this email, but if someone is running the site, could you please explain to me how it is that email is being sent to me from TLUG as it has been now for some decades, and when I try to log into https://lists.gtalug.org, I am told by means of some script that it hasn't heard of me, and there is no record of sciguy@vex.net existing. How am I now expected to make adjustments to my account if I am receiving email, yet the server is telling me I don't exist? Paul King