Make a call to this endpoint to unsubscribe a user from a subscription type or channel. If no subscriptions are present in the request, the user is unsubscribed from all subscriptions. If subscriptions are present in the request, the user is unsubscribed from the requested type or channel combination. By default, if a subscription exists, but the user is already unsubscribed, it records the attempt to unsubscribe the subscription again. For TEXT subscriptions, a message is sent to the person indicating that they are unsubscribed.
For the user object, the email data point determines which email subscriptions a user has and the phone data point determines which text (or sms) subscriptions a user has. Passing in an email does not locate, nor unsubscribe, a user from any sms subscriptions. Similarly, passing in a phone does not locate, nor unsubscribe, a user from any email subscriptions.