code: def index():
      
      oauth = current_app.extensions['oauthlib.client']
  
      services = []
      service_map = {}
      i = 0
  
      for appid, conf in six.iteritems(
              current_app.config['OAUTHCLIENT_REMOTE_APPS']):
          if not conf.get('hide', False):
              services.append(dict(
                  appid=appid,
                  title=conf['title'],
                  icon=conf.get('icon', None),
                  description=conf.get('description', None),
                  account=None
              ))
              service_map[oauth.remote_apps[appid].consumer_key] = i
              i += 1
  
      # Fetch already linked accounts
      accounts = RemoteAccount.query.filter_by(
          user_id=current_user.get_id()
      ).all()
  
      for a in accounts:
          if a.client_id in service_map:
              services[service_map[a.client_id]]['account'] = a
  
      # Sort according to title
      services.sort(key=itemgetter('title'))
  
      return render_template(
          'invenio_oauthclient/settings/index.html',
          services=services
      )
docs: List linked accounts.