How to validate Image.Network?

Question

I requested image from api, some times users haven't employee images. How to set bydefault image If request image null?

try {
      return Image.network(
        "$_url/nativeapi/v1.0/s3object/GetEmployeeImage?siteId=${widget
            .siteId}&employeeId=${widget.employeeId}",
        width: 100.0,
        height: 100.0,
      );
    }
    on SocketException catch(e){
      return Image.asset(
        "assets/images/logo.png",
        width: 100.0,
        height: 100.0,
      );
    }