How can i change my username?

AlexandrePeres10

SUPERNOVA 8

@AlexandrePeres10 Hello Alex and welcome to the International forum.
Unfortunately it's not possible to change your manager name.
The only thing you can do is delete this account and then create a new account with the name that you wish to have and keep forever.

How to delete an account:

Go to Profile >> Edit >> on the bottom at the right side you'll see the Delete Account button http://prntscr.com/dyh5rk

Good luck mate.