Google used Godaddy as underlying domain registrar and creates an admin account bloggeradmin@
If you go through Google Help & Support documentation, you are just going to go through circles since there is no easy way to reset the password. One of the Google instruction in my case was to change the CNAME setting allowing a sub domain to forward to google.com. Since I don't have access to any DNS settings, how do they expect me to proceed ?
I am not a big-enterpricy customer for Google, and hence don't qualify for any of their in-person support. All I am left with is going through documentation and web searches. I almost thought I would loose my domain and started to put in request for Domain Nab service that would cost as high as $50 instead of the usual $10 for renewal.
Later on I stumbled across the Google Product Forum here. As I hoped, I was not the only one was so disappointed with Google support and trying to resolve the mess. As it happens, you can reset the admin account password for your account through this wonderful yet very secret link (https://admin.google.com/DOMAIN.com/ForgotAdminAccountInfo). I was able to reset the bloggeradmin@
After going through this horrible experience with Google Domains, I decided to opt out of its service. The integration with Godaddy is horrible and I would rather manage my domain registrations through other providers, my preferred one is name.com. The domain transfer request is underway and hopefully there should be no hiccups in the future. Hope this information helps other bloggers who are going through similar ordeal.