Synchronously sets up a D-Bus connection for exchanging D-Bus messages with the end represented by
The D-Bus connection will interact with
stream from a worker thread. As a result, the caller should not interact with
after this method has been called, except by calling unref on it.
observer is not null it may be used to control the authentication process.
This is a synchronous failable constructor. See @new for the asynchronous version.
the GUID to use if a authenticating as a server or null
flags describing how to make the connection
a DBusAuthObserver or null
a Cancellable or null