def __create_channel_run(self, channel, username, token):
        """Sends a post request to create the channel run."""
        data = {
            'channel_id': channel.get_node_id().hex,
            'chef_name': self.__get_chef_name(),
            'ricecooker_version': __version__,
            'started_by_user': username,
            'started_by_user_token': token,
            'content_server': config.DOMAIN,
        }
        try:
            response = requests.post(
                config.sushi_bar_channel_runs_url(),
                data=data,
                auth=AUTH)
            response.raise_for_status()
            return response.json()['run_id']
        except Exception as e:
            config.LOGGER.error('Error channel run: %s' % e)
        return None
Sends a post request to create the channel run.