diff --git a/Assets/Stash.Sample/Scripts/DeeplinkExample.cs b/Assets/Stash.Sample/Scripts/DeeplinkExample.cs
index 63b5aa0..dc0ac79 100644
--- a/Assets/Stash.Sample/Scripts/DeeplinkExample.cs
+++ b/Assets/Stash.Sample/Scripts/DeeplinkExample.cs
@@ -3,6 +3,7 @@
 using Stash.Core;
 using Stash.Core.Exceptions;
 using Stash.Models;
+using Stash.Scripts.Core;
 using TMPro;
 using UnityEngine;
 
@@ -38,9 +39,21 @@ private void Awake()
         }
     }
     
-    private void Start()
+    private async void Start()
     {
+        Debug.Log("TRYING ");
 
+        try
+        {
+            LinkResponse response = await StashCustomLogin.LinkFacebook("LINK_CODE", "PLAYER_ID", "FB_APPID", "ACCESS_TOKEN", StashEnvironment.Test);
+
+        }
+        catch (StashRequestError e)
+        {
+            Console.WriteLine(e);
+            throw;
+        }
+        
     }
 
     
diff --git a/Assets/Stash/Scripts/Core/RestClient.cs b/Assets/Stash/Scripts/Core/RestClient.cs
index af5a545..ed6f3d1 100644
--- a/Assets/Stash/Scripts/Core/RestClient.cs
+++ b/Assets/Stash/Scripts/Core/RestClient.cs
@@ -1,7 +1,9 @@
+using System;
 using System.Collections.Generic;
 using System.Text;
 using System.Threading.Tasks;
 using Stash.Models;
+using UnityEngine;
 using UnityEngine.Networking;
 
 namespace Stash.Core
@@ -80,11 +82,29 @@ public static async Task<Response> Post(string url, string body, IEnumerable<Req
                     webRequest.SetRequestHeader(header.Key, header.Value);
                 }
             }
-
-            // Set default headers for a JSON request
+            
+            // Set default Stash headers 
             webRequest.SetRequestHeader("Content-Type", "application/json");
             webRequest.SetRequestHeader("Accept", "application/json");
 
+            // Set analytics headers
+            try
+            { 
+                webRequest.SetRequestHeader("x-stash-unity-sdk-version", StashConstants.SdkVersion);
+                webRequest.SetRequestHeader("x-stash-unity-platform", Application.platform.ToString());
+                webRequest.SetRequestHeader("x-stash-unity-runtime", Application.unityVersion);
+                webRequest.SetRequestHeader("x-stash-unity-build-guid", Application.buildGUID);
+                webRequest.SetRequestHeader("x-stash-unity-app-version", Application.version);
+                webRequest.SetRequestHeader("x-stash-unity-device-os", SystemInfo.operatingSystem);
+                webRequest.SetRequestHeader("x-stash-unity-device-model", SystemInfo.deviceModel);
+                webRequest.SetRequestHeader("x-stash-unity-device-type", SystemInfo.deviceType.ToString());
+                webRequest.SetRequestHeader("x-stash-unity-editor", Application.isEditor.ToString());
+            }
+            catch (Exception e)
+            {
+                Debug.Log("[STASH] Skipping analytics headers, error: " + e);
+            }
+            
             // Set the body payload and download handler for the request
             webRequest.uploadHandler = new UploadHandlerRaw(bodyPayload);
             webRequest.downloadHandler = new DownloadHandlerBuffer();
diff --git a/Assets/Stash/Scripts/Core/StashConstants.cs b/Assets/Stash/Scripts/Core/StashConstants.cs
index f26b93f..6c4676c 100644
--- a/Assets/Stash/Scripts/Core/StashConstants.cs
+++ b/Assets/Stash/Scripts/Core/StashConstants.cs
@@ -2,6 +2,9 @@ namespace Stash.Core
 {
     public class StashConstants
     {
+        //TODO: Switch to package file.
+        public const string SdkVersion = "0.9.0";
+        
         //Root URLs
         public const string RootUrl = "https://api.stash.gg";
         public const string RootUrlTest = "https://test-api.stash.gg";
diff --git a/Assets/Stash/Scripts/Core/StashCustomLogin.cs b/Assets/Stash/Scripts/Core/StashCustomLogin.cs
index a50bb2b..4be793d 100644
--- a/Assets/Stash/Scripts/Core/StashCustomLogin.cs
+++ b/Assets/Stash/Scripts/Core/StashCustomLogin.cs
@@ -21,10 +21,10 @@ public static class StashCustomLogin
     /// <param name="code">Stash code challenge from the log in deeplink.</param>
     /// <param name="playerId">Player identification, that will be used to identify purchases.</param>
     /// <param name="idToken">Valid identification token (OICD) of the player.</param>
-    /// <param name="profileImageUrl">URL to the player's profile image/avatar to be displayed during login and on web shop.</param>
+    /// <param name="profileImageUrl">Profile image url of the player.</param>
     /// <param name="environment">Stash API environment (Defaults to Test).</param>
     /// <returns>Returns a confirmation response, or throws StashAPIRequestError if fails.</returns>
-    public static async Task<LinkResponse> CustomLogin(string code, string playerId, string idToken, string profileImageUrl, StashEnvironment environment = StashEnvironment.Test)
+    public static async Task<LinkResponse> CustomLogin(string code, string playerId, string idToken, string profileImageUrl = null, StashEnvironment environment = StashEnvironment.Test)
     {
         // Create the authorization header with the access token
         RequestHeader authorizationHeader = new()