qrscanner.dart

body: Stack(
        children: [
          MobileScanner(
              allowDuplicates: false,
              controller: cameraController,
              onDetect: (barcode, args) {
                final String? code = barcode.rawValue;
                debugPrint('Barcode found! $code');
              }),
          QRScannerOverlay(overlayColour: Colors.black.withOpacity(0.5)),
        ],
      ),