"Otherwise, you would have to trust a third party with your Apple ID credentials and iMessage signing key." Is that possible ? I'd like to be able to send/rec

"Otherwise, you would have to trust a third party with your Apple ID credentials and iMessage signing key." Is that possible ? I'd like to be able to send/receive "imessages" (and prompt typing ellipses, etc.) from a twilio number. It's low priority, but an interesting problem ... Is imessage an open spec somewhere wherein you could use API credentials and interface with it, arbitrarily ?