1. Create legacy token at https://api.slack.com/custom-integrations/legacy-tokens 2. Invite user to slack: https://slack.com/api/users.admin.invite?token=XXX&email=test@email.com&channels=C000000001,C000000002 You should get a response: `{"ok": true}` 3. User gets an email like this:  4. User clicks "Join Now" and they are forced to use the email you specified:  How to deep link to a user's profile: https://slack.com/help/articles/360003827751-Create-a-link-to-a-members-profile-
Create legacy token at https://api.slack.com/custom-integrations/legacy-tokens
Invite user to slack: https://slack.com/api/users.admin.invite?token=XXX&email=test@email.com&channels=C000000001,C000000002
You should get a response:
{"ok": true}How to deep link to a user's profile:
https://slack.com/help/articles/360003827751-Create-a-link-to-a-members-profile-