Cannot download photos from facebook SDK

Hi,

I am trying to get all uploaded photos from Facebook using IOS Swift. The code is below. The data has 0 elements, means no data. If I run the url in facebook api explorer, I get the data. I have got access token from Facebook and i get get profile picture without problem. But I cannot get uploaded photos from facebook. It always returns empty list. Any help will be appreciated.

    public func getUploadedPhotos() -> Void
    {
        //let params = ["fields": "created_time.order(reverse_chronological),picture&limit=10&type=uploaded"]
        let params = ["fields": "created_time,picture"]
        let requestPhotoList = FBSDKGraphRequest(graphPath: "me/photos?fields=created_time,from,album&limit=10&type=uploaded", parameters: nil )!
      
        requestPhotoList.start(completionHandler: { (connection: FBSDKGraphRequestConnection!, result: Any!, error: Any!) -> Void in
            if ((error) != nil)
            {
                // Process error
                print("Error: \(String(describing: error))")
            }
            else
            {
                let result = result as? NSDictionary
              
                let data = result?["data"] as? NSArray;
                let paging = result?["paging"] as? NSDictionary;
              
                if((data) != nil)
                {
                    for photos in data!
                    {
                        let photos = photos as! NSDictionary
                        let photourl = photos["picture"] as! String
                        let id = photos["id"] as! String
                      
                        var photoDict = [String:String]()
                        photoDict[id] = photourl
                        self.photoList.append( photoDict)
                    }
                }
              
            }
        }
        )
          
    }