- connect(socket, SIGNAL(error(QAbstractSocket::SocketError)), SLOT(onSocketError(QAbstractSocket::SocketError)));
- connect(socket, SIGNAL(disconnected()), SLOT(onSocketDisconnected()));
+ connect(socket, selectOverload<QAbstractSocket::SocketError>(&QTcpSocket::error), this, &AuthHandler::onSocketError);
+ connect(socket, &QAbstractSocket::disconnected, this, &AuthHandler::onSocketDisconnected);