BBpress showing emails as usernames

Hi there!
So i am using memberpress for my site for users to signup and use my forum. But for some reason on the bbpress forum its showing the users' emails as their usernames which sucks as I do not want their emails to be seen by anyone. How do I ensure that their usernames are in fact the ones they have chosen? It could be a setting on memberpress. Would be great if someone in your team has some knowledge on this topic.
Thanks!