In conjunction with the Sms Api, an Sms receiving invitee should be able to request that they longer receive any Sms's in a manner which cannot be controlled or prevented by app owner.
There should be a table containing contacts by id/lookup key, and whether they're subscribed or unsubscribed. once unsubscriped via sms api, they should be removed from attendance in all schedules, should not be able to be added back, and can't receive sms messages through the app.
In conjunction with the Sms Api, an Sms receiving invitee should be able to request that they longer receive any Sms's in a manner which cannot be controlled or prevented by app owner.
There should be a table containing contacts by id/lookup key, and whether they're subscribed or unsubscribed. once unsubscriped via sms api, they should be removed from attendance in all schedules, should not be able to be added back, and can't receive sms messages through the app.