note about non-personal mode

README.md

@@ -177,6 +177,16 @@ func application(_ application: UIApplication, didFinishLaunchingWithOptions lau
  GW.initialize( launchOptions, false);
 
 ```
+
+
+>**GDPR NOTE:** By default, the SDK uses advertisement ID (IDFA) as a user ID to send events to **Game of Whales** server. In order to work in a non-personal mode when a random value will be used as a user ID, the SDK should be initialized as follows:
+
+```swift
+ let nonPersonal = true;
+ let debugLog = true;
+ GW.initialize(withGameKey: "YOU_GAME_KEY", launchOptions, debugLog, nonPersonal);
+```
+
 ## Purchases
 
 **Purchases with verification on GOW server side**
@@ -514,6 +524,14 @@ Call ```initialize``` method when you launch your app.
  [GW initialize:launchOptions :debugLog];
 ```
 
+> **GDPR NOTE:** By default, the SDK uses advertisement ID (IDFA) as a user ID to send events to **Game of Whales** server. In order to work in a non-personal mode when a random value will be used as a user ID, the SDK should be initialized as follows:
+
+```objc
+ BOOL nonPersonal = TRUE;
+ BOOL debugLog = TRUE;
+ [GW Initialize:launchOptions :debugLog :nonPersonal];
+```
+
 ## Purchases
 
 **Purchase with verification on GOW server side**