People are not interested in what you do . I think, more and more, they're not even really interested necessarily in how you look on paper, like a

Incomplete question. However, I inferred you are referring to the best word that likely completes the blank space.

or don't do;

Explanation:

So, this statement could rightly read;

"People are not interested in what you do or don't. I think, more and more, they're not even really interested necessarily in how you look on paper, like a"

you can only change it if your real name or personal information was in it. and if so you would need to contact them directly with a username change request.