I created my account with 2 other friends, one after the other. They are both playing the game right now without any issue while I'm stuck on the login page of the client saying "Invalid username or password". But I know both of the things I entered are right because I used these two to connect here. And I copied and pasted so it should be the exact same thing.
I have no idea how to make this work. I tried to re-sign-up but I can't because "Username already taken". I tried to restart the game. I tried to re-download the game. I'm out of ideas.