const result = await redisClient.ft.aggregate(indexName, queryPattern, {

      STEPS: [{

        type: AggregateSteps.FILTER,

        expression: `${userList.map(username => `@username=='${username}'`).join(' || ')}`,

      }, {

        type: AggregateSteps.GROUPBY,

        properties: ['@pids'],

        REDUCE: [{

          type: AggregateGroupByReducers.TOLIST,

          property: '@username',

          AS: 'users',

        }],

      }],

    })

    logger.info('Got result\nSize: ', JSON.stringify(result.total))

    logger.debug('\nData: ' + JSON.stringify(result.results))

  } catch (error) {

    logger.error('Error:', error)

  }