Identify user by Nick name


I have noticed that when I am using nextcloud there seems to be no way for the user to set their own nick that will be used in shares etc.
I have entered my data into the personal settings for instance and now when others using the server share with me they always see my full name.
Obviously I could drop my name back down in the personal settings and only put in a display name but I would prefer to set a nickname.

Am I just not seeing how to do this?