public async Task <IActionResult> DeleteConfirmed(int id)
{
var device = await db.Device.FindAsync(id);
db.Device.Remove(device);
await db.SaveChangesAsync();
// Edit device in cloud
Task <bool> t1 = cloud.DeleteDevice(device);
Task.WaitAll(t1);
if (t1.Result)
{
//device deleted
}
return(RedirectToAction(nameof(Index)));
}