Slack

export SLACK_DEVELOPER_MENU=true

open -a /Applications/Slack.app

View -> Developer -> Toggle DevTools

Network

Click on a channel e.g. general. Look for list? (shows Request URL: https://edgeapi.slack.com/cache/XXX/users/list?p=32) - Right click it -> Copy -> Copy as cURL

edgeapi.slack.com is slack's API server

https://api.slack.com/methods/users.list 

can copy on command line or https://curlconverter.com/ 

import pandas as pd

pd.json_normalize(response.json()["results"])

names