Feature Request - Vary the text in the Checkin and Door Open Emails

[hightechhostel]

At the moment the Checkin and Door Open Emails send the same email to space admins. Because we are parsing these emails and using the email to trigger other events, we need the text in these emails to be varied slightly.

For example, we parse the emails to send a message on Slack telling members a new guest has arrived in the space. Right now this message gets sent when the guest "checks in" AND each time the user "opens doors" (because they need a slice of pizza outside).

Having different wording on the emails will help us trigger Slack messages only when the user checks in.