Create a user.

        :type user_name: string
        :param user_name: The name of the new user

        :type path: string
        :param path: The path in which the user will be created.
                     Defaults to /.

def create_user(self, user_name, path='/'):
        """
        Create a user.

        :type user_name: string
        :param user_name: The name of the new user

        :type path: string
        :param path: The path in which the user will be created.
                     Defaults to /.

        """
        params = {'UserName' : user_name,
                  'Path' : path}
        return self.get_response('CreateUser', params)