retreive a list of followers from twitter

fetchFollowerCounts.js

const cheerio = require('cheerio')
const axios = require('axios').default

async function fetchFollowerCounts(usernames) {
  const followerData = usernames.map((username) => {
    return axios.get(`https://mobile.twitter.com/${username}`).then((res) => {
      const $ = cheerio.load(res.data)
      const searchContext = `a[href='/${username}/followers']`
      const followerCountString = $(searchContext)
        .text()
        .match(/[0-9]/gi)
        .join('')

      return { user: username, followerCount: Number(followerCountString) }
    })
  })

  return Promise.all(followerData)
}

fetchFollowerCounts(['mtliendo', '_mallorybrewer_'])

exports.handler = fetchFollowerCounts