We are working on one click social media sign up right now. So all those issues will be non issues soon enough. The problem with using their email as their user

We are working on one click social media sign up right now. So all those issues will be non issues soon enough. The problem with using their email as their users name is most people don't want their email address displayed for everyone to see. Or do you mean have them fill out those particulars after they have signed up? Either way they will have to fill that information out at some point.