How do you change your username in Movie Star Planet

Hi everyone who asked this question. My username is Kourtinpopinko. I don't really know a possible way to change your username, but its very easy to change your password. If thats what you meant. Anyway try searching again if thats what you ment instead.
Please watch my movies
<3 my artbooks too
Bye
-Kourtinpopinko