SMS - we need double opt-in

In order to be compliant with SMS in US and EU, we need double opt-in So, when the user adds a phone number for SMS, we need to have the following flow: Sms 1: please confirm by replying YES that you opt in for messages from Fromflow etc (copy tbd from Jason) Wait for the reply of Yes Save the logs of the reply including timestamp Send SMS 2 (the current one that we have): you opted in etc Only after that we send sms, otherwise we don't. We do this flow only once per phone number