We will be able to become registered users of Pottermore later, so we will need usernames and passwords because it wouldn't work any other way. au did I get your swali wrong?
Yes. wewe dont choose them though, there are a orodha of I think 4 (lol I don't even remember for all I know it was 2) usernames selected at bila mpangilio in which wewe can choose from. Most of them sound really cool so don't worry you'll probably like it au grow to like it as wewe go along. I go kwa the name MidnightElm, trust me you'll like the names I had trouble deciding which one I liked zaidi lol. :)