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. ou did I get your question wrong?
Yes. toi dont choose them though, there are a liste of I think 4 (lol I don't even remember for all I know it was 2) usernames selected at aléatoire in which toi can choose from. Most of them sound really cool so don't worry you'll probably like it ou grow to like it as toi go along. I go par the name MidnightElm, trust me you'll like the names I had trouble deciding which one I liked plus lol. :)
