Block the user.

        Args:
            **kwargs: Extra options to send to the server (e.g. sudo)

        Raises:
            GitlabAuthenticationError: If authentication is not correct
            GitlabBlockError: If the user could not be blocked

        Returns:
            bool: Whether the user status has been changed

def block(self, **kwargs):
        """Block the user.

        Args:
            **kwargs: Extra options to send to the server (e.g. sudo)

        Raises:
            GitlabAuthenticationError: If authentication is not correct
            GitlabBlockError: If the user could not be blocked

        Returns:
            bool: Whether the user status has been changed
        """
        path = '/users/%s/block' % self.id
        server_data = self.manager.gitlab.http_post(path, **kwargs)
        if server_data is True:
            self._attrs['state'] = 'blocked'
        return server_data