Restore a pending invitation

OpenIMClient.getInstance().signalingManager.getSignalingInvitationInfoStartApp(
    new OnBase<SignalingInfo>() {
        @Override
        public void onSuccess(SignalingInfo info) {
            // Validate the invitation and roomID in info before using it.
        }

        @Override
        public void onError(int code, String error) {
            // code and error describe why the query failed.
        }
    }
);