When I click on my username that appears on the top of page, I'm getting:
"Oops! We had an error.
We'll get to fixing that soon.
You can try refreshing the page, or head back to the Add-ons homepage."
But I still can access my account settings: https://addons.mozilla.org/en-US/firefox/users/edit
and even edit them.
Go to Solution.
This is not the right place to ask for help with your addons.mozilla.org account. Those questions belong in the Mozilla Add-ons forum at forum.addons.mozilla.org (there's a FAQ (frequently asked questions) link there, in case it helps).
P.S. I deleted the spam post in this thread you reported and your comment about it.