Username of Facebook login

Hi,

New user login with Facebook will have their email as a username. It's a problem if user post comment and having their email as a username. I also don't want user to use their own name to post.

I want to use K2 profile but with setting like pictures below, I don't know how to make users being able to choose their own username.

Any idea how?

joola-.png

k2-.png

I think that K2 don't give you this possibility but more details you will surely get on K2 support forum. Somewhere in K2 configuration you will find only option to show username/full name but I don't see anywhere option to modify username.