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