I went to log into the client just now, with my saved info, and it said invalid account name or password. Tried retyping everything, restarted, even changed the password and still no luck. I can log in to the forums, the website, everything but the client no problem. I last played 11/22/22 with no issues so the account should be active still.
What's your user name? Is it nitebane21 or something else? Also, what platform (PC, Mac, PS4) and what client do you use? I can take a look and see what would be preventing you from being able to log in.
I'm not entirely familiar with that client. Is it the old Java one or is it Unity? Regardless, it is out of date and I recommend using the version on Steam. I'll still look into why it's failing (I think I know why, honestly) and see if I can get a fix up later tonight.