How to delete User using Parse (Error: insufficient auth to delete user )

Question

Hi, I’m creating an app using Parse to save data in Heroku. I’m having a hard time deleting Users. I can delete objects from other collections with the command:

objeto.deleteInBackground(new DeleteCallback() {
    @Override
    public void done(ParseException e) {
           Toast.makeText(getContext(),"Exercicio removido.",Toast.LENGTH_SHORT).show();
           }
  });

But when it comes to deleting Users, it doesn’t work. It leaves Parseexception and with the value of insufficient auth to delete user. Could someone help me solve this problem?