libqaul api scopes

contacts
- modify(userauth, contact-id, lambda)
- get(userauth, contact-id)
- query(userauth, contact query)
- all(userauth)
messages
- send(userauth, mode, id_type, into service, into tagset, payload (vec u8))
- subscribe(userauth, into service, into tagset)
- query(userauth, into service, msgquery)
services
- register(service name, callback(service event))
- unregister(name)
- save(userauth, into service, metadata map, into tagset)
- delete(userauth, into service, into key)
- query(userauth, into service, into tagset)
users
- list()
- list_remote() (???)
- is_authenticated(userauth)
- create(password)
- delete(userauth)
- change_pw(userauth, new password)
- login(user id, password)
- logout(userauth)
- get(user id)
- update(userauth, user update)