[ Version ( since = "0.13.9" ) ]
public Contact self_contact { get; }
A Contact representing the local user on this connection, or null if
not yet available.
If the local user's unique identifier changes (for instance by using /nick on IRC), this property will change to a different Contact object representing the new identifier, and notify will be emitted.
The Contact object is guaranteed to have all of the features previously passed to add_contact_features prepared.
To wait for a non-%NULL self-contact (and other properties), call
prepare_async with the feature TP_CONNECTION_FEATURE_CONNECTED.