returns the username on this computer

def get_user(self):
        """ 
        returns the username on this computer 
        """
        for name in ('LOGNAME', 'USER', 'LNAME', 'USERNAME'):
            user = os.environ.get(name)
            if user:
                break     
        for u in users:
            if u['name'] == user:
                return u['type'], u['name']