def METHOD_NAME(self, message, host=None, emby_apikey=None):
    """
    Notify Emby host via HTTP API.
    :return: True for no issue or False if there was an error
    """
    # fill in omitted parameters
    if not host:
        host = app.EMBY_HOST
    if not emby_apikey:
        emby_apikey = app.EMBY_APIKEY
    url = 'http://{host}/emby/Notifications/Admin'.format(host=host)
    data = json.dumps({
        'Name': 'Medusa',
        'Description': message,
        'ImageUrl': app.LOGO_URL
    })
    try:
        resp = self.session.post(
            url=url,
            data=data,
            headers={
                'X-MediaBrowser-Token': emby_apikey,
                'Content-Type': 'application/json'
            }
        )
        resp.raise_for_status()
        if resp.text:
            log.debug('EMBY: HTTP response: {0}', resp.text.replace('\n', ''))
        log.info('EMBY: Successfully sent a test notification.')
        return True
    except (HTTPError, RequestException) as error:
        log.warning('EMBY: Warning: Unable to contact Emby at {url}: {error}',
                    {'url': url, 'error': ex(error)})
        return False