It seems this is not yet mentioned in this thread:
https://akulichalexandr.wordpress.co...task-overview/

I compiled this for my Jolla and it seems to be working. My skills on writing an accounts plugin are a bit lacking so I couldn't (yet) make the sign in work properly. After some hacking I managed to sign in and send some messages. Group messages are not working, neither does encrypted chats or anything else but normal message to one person.