Now only EasyBlog and EasyDiscuss has 'nickname' in user field. EasySocial has none.
If you integrate user from blog and discuss to social, fullname will be used as nickname.

in blog or discuss, such as:
Username: bill (for login or permalink)
Fullname: Bill Gates (for real person authentication)
Nickname: William (for writing blog or chatting in forum)

If integration, user has to use Bill Gates to post blog or send discussion.
Do you want add a 'nickname' in EasySocial user profile?
Please +1 below~