i want to get all facebook user photos

i want to get all user photos from facebook, then display Them into scene I tried several times, but I have no result. Ihave no error in my code, when i enter in play mode nothing happen. Please i need your help Thank you in advance

these are my two scripts:

the first script:

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 using Facebook.MiniJSON;
 
 public class Util : ScriptableObject
 {
     public static string GetPictureURL(string facebookID, int? width = null, int? height = null, string type = null)
     {
         string url = string.Format("/{0}/picture", facebookID);
         string query = width != null ? "&width=" + width.ToString() : "";
         query += height != null ? "&height=" + height.ToString() : "";
         query += type != null ? "&type=" + type : "";
         if (query != "") url += ("?g" + query);
         return url;
     }
 
     public static void FriendPictureCallback(FBResult result)
     {
         if (result.Error != null)
         {
             Debug.LogError(result.Error);
             return;
         }
 
         
     }
 
     public static Dictionary<string, string> RandomFriend(List<object> friends)
     {
         var fd = ((Dictionary<string, object>)(friends[Random.Range(0, friends.Count - 1)]));
         var friend = new Dictionary<string, string>();
         friend["id"] = (string)fd["id"];
         friend["first_name"] = (string)fd["first_name"];
         return friend;
     }
 
     public static Dictionary<string, string> DeserializeJSONProfile(string response)
     {
         var responseObject = Json.Deserialize(response) as Dictionary<string, object>;
         object nameH;
         var profile = new Dictionary<string, string>();
         if (responseObject.TryGetValue("first_name", out nameH))
         {
             profile["first_name"] = (string)nameH;
         }
         return profile;
     }
     
     public static List<object> DeserializeScores(string response) 
     {
 
         var responseObject = Json.Deserialize(response) as Dictionary<string, object>;
         object scoresh;
         var scores = new List<object>();
         if (responseObject.TryGetValue ("data", out scoresh)) 
         {
             scores = (List<object>) scoresh;
         }
 
         return scores;
     }
 
     public static List<object> DeserializeJSONFriends(string response)
     {
         var responseObject = Json.Deserialize(response) as Dictionary<string, object>;
         object friendsH;
         var friends = new List<object>();
         if (responseObject.TryGetValue("friends", out friendsH))
         {
             friends = (List<object>)(((Dictionary<string, object>)friendsH)["data"]);
         }
         return friends;
     }
 
 
     public static List<object> DeserializeJSONAllPictures(string response)
     {
         var responseObject = Json.Deserialize(response) as Dictionary<string, object>;
         object PicturesH;
         var Pictures = new List<object>();
         if (responseObject.TryGetValue ("Pictures", out PicturesH)) 
         {
             Pictures = (List<object>)(((Dictionary<string,object>)PicturesH)["data"]);
         }
         return Pictures;
     }
     
     public static void DrawActualSizeTexture (Vector2 pos, Texture texture, float scale = 1.0f)
     {
         Rect rect = new Rect (pos.x, pos.y, texture.width * scale , texture.height * scale);
         GUI.DrawTexture(rect, texture);
     }
     public static void DrawSimpleText (Vector2 pos, GUIStyle style, string text)
     {
         Rect rect = new Rect (pos.x, pos.y, Screen.width, Screen.height);
         GUI.Label (rect, text, style);
     }
 }

The second script:

 using UnityEngine;
 using System.Collections;
 using UnityEngine.UI;
 using Facebook;
 public class FacbookHolder : MonoBehaviour {
     public GameObject Picture;
     void Awake()
     {
         FB.Init (SetInit, onHideUnity);
     }
 
     private void SetInit()
     {
         Debug.Log("FB Init Done");
         if (FB.IsLoggedIn) {
             Debug.Log ("FB lOGGED iN");
         }else {
             //FBLogin();
         }
     }
 
     
     private void onHideUnity(bool isGameShown)
     {
         if (!isGameShown) {
             Time.timeScale = 0;
         } else 
         {
             Time.timeScale = 1;
         }
     }
     public void FBLogin()
     {
         FB.Login ("email", AuthCallback);
     }
     void AuthCallback(FBResult result)
     {
         if (FB.IsLoggedIn) {
             Debug.Log ("user logged in");
         } else {
             Debug.Log("login failed");
         }
     }
     void GetPicture()
     {
         if (FB.IsLoggedIn) {
             FB.API(Util.GetPictureURL("me",100,100) , Facebook.HttpMethod.GET, ProfilePicture);
         }
     }
     void ProfilePicture(FBResult result)
     {
         if (result.Error != null) {
             Debug.Log ("Problem with profile picture");
             FB.API (Util.GetPictureURL ("me", 100, 100), Facebook.HttpMethod.GET, ProfilePicture);
             Debug.Log ("picture");
             return;
         } else {
             Debug.Log("errrooooooooooorrrrr");
         }
         Image UserPicture = Picture.GetComponent<Image> ();
         UserPicture.sprite = Sprite.Create (result.Texture, new Rect (0, 0, 100, 100), new Vector2 (0, 0));
     }
 
      void GetUserPictures()
     {
         if (FB.IsLoggedIn) {
             FB.API(Util.GetPictureURL("/me/photos/uploaded",100,100) , Facebook.HttpMethod.GET, Photos);
             return;
         }
         // void Photos() ?????
             // how to load Them into scene
              
     }
 
 }