We only extract and save the following info on all your team members.
- Slack user id - to be able to communicate with you on a direct message
- Timezone - to ensure we never ping you on odd hours
- Email - to create profile pages (feature that is coming soon)
- Name cause don't we need to be on a first name basis :)
This info is available on Slack's UserInfo API we consume, once we are in your public channel.