how to fetch witness list with dsteem

witness_list.js

import * as dsteem from 'dsteem'

const client = new dsteem.Client('https://api.steemit.com')

export default async function main() {
    const witnesses = await client.database.call('get_witnesses_by_vote', ["",100]);
    console.log(witnesses) // Open your browser's console to see full output
}