@cli.register_custom_action('<STR_LIT>')<EOL><INDENT>@exc.on_http_error(exc.GitlabTodoError)<EOL>def mark_all_as_done(self, **kwargs):<DEDENT>
result = self.gitlab.http_post('<STR_LIT>', **kwargs)<EOL>try:<EOL><INDENT>return int(result)<EOL><DEDENT>except ValueError:<EOL><INDENT>return <NUM_LIT:0><EOL><DEDENT>
Mark all the todos as done.

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

        Raises:
            GitlabAuthenticationError: If authentication is not correct
            GitlabTodoError: If the server failed to perform the request

        Returns:
            int: The number of todos maked done