Delete largest old Slack files

Senicide.js

/**
 * Deletes the largest `numToDelete` files older than `minAgeDays` on your slack.
 * Can only do 1000 at a time because I didn't want to deal with pagination.
 * YOU NEED TO BE AN ADMIN FOR THIS TO DELETE THINGS THAT YOU DIDN'T UPLOAD!
 * @param {string} token       A legacy slack token. Get yours at https://api.slack.com/custom-integrations/legacy-tokens
 * @param {number} minAgeDays  The number of days old a file can be to be deleted.
 * @param {number} numToDelete The number of files to delete total.
 */
async function deleteOldLargeFiles(token, minAgeDays, numToDelete) {
  // Slack does everything in seconds, apparently.
  const earliestDate = Date.now() / 1000 - 60 * 60 * 24 * minAgeDays;

  const listResponse = await fetch(`https://slack.com/api/files.list?token=${token}&count=1000&ts_to=${earliestDate}`);
  const listData = await listResponse.json();
  const files = listData.files.slice().sort((a, b) => b.size - a.size);

  for (let index = 0; index < Math.min(numToDelete, files.length); index++) {
    const response = await fetch(`https://slack.com/api/files.delete?token=${token}&file=${files[index].id}`);
    const data = await response.json();
    if (data.ok) {
      console.log(`Deleted ${files[index].title}`);
    } else {
      console.error(`Deleting ${files[index].title} failed.\n${data.error}`);
    }
  }
}