Slack Channel User Extractor

The second argument is Slack Workspace URL. We need it to know which Slack users you want to target.
This URL should look something like yourcompany.slack.com.

Finally, the third argument field is Spreadsheet URL or channel name. Use it to specify which users your interested in either one: #team for instance. If you want to scrape all users, use the #general channel (names might change depending on your target Slack).
If you wish to scrape multiple channels, write those down in a Google Spreadsheet (one per row), in the first column. Make sure to make this spreadsheet public and paste the link in this field.