Save the changes made to the object to the server.

        The object is updated to match what the server returns.

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

        Raise:
            GitlabAuthenticationError: If authentication is not correct
            GitlabUpdateError: If the server cannot perform the request

def save(self, **kwargs):
        """Save the changes made to the object to the server.

        The object is updated to match what the server returns.

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

        Raise:
            GitlabAuthenticationError: If authentication is not correct
            GitlabUpdateError: If the server cannot perform the request
        """
        updated_data = self._get_updated_data()
        # Nothing to update. Server fails if sent an empty dict.
        if not updated_data:
            return

        # call the manager
        obj_id = self.get_id()
        server_data = self.manager.update(obj_id, updated_data, **kwargs)
        if server_data is not None:
            self._update_attrs(server_data)