From ca1030942cb40aa75a78baa7c51696e116583967 Mon Sep 17 00:00:00 2001
From: John Kodumal <john@launchdarkly.com>
Date: Thu, 29 Oct 2015 13:08:47 -0700
Subject: [PATCH] Use the advertising identifier instead of a random UUID when
 no key is specified

---
 Darkly/LDUserBuilder.m | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/Darkly/LDUserBuilder.m b/Darkly/LDUserBuilder.m
index 7d045418..4ea401fa 100644
--- a/Darkly/LDUserBuilder.m
+++ b/Darkly/LDUserBuilder.m
@@ -6,6 +6,7 @@
 #import "LDUserBuilder.h"
 #import "DarklyUtil.h"
 #import "DataManager.h"
+@import AdSupport;
 
 @interface LDUserBuilder() {
     NSString *key;
@@ -188,7 +189,7 @@ -(User *)build
         DEBUG_LOG(@"LDUserBuilder building User with key: %@", key);
         [user key:key];
     } else {
-        NSString *uniqueKey = [[NSUUID UUID] UUIDString];
+        NSString *uniqueKey = [[[ASIdentifierManager sharedManager] advertisingIdentifier] UUIDString];
         DEBUG_LOG(@"LDUserBuilder building User with key: %@", uniqueKey);
         [user key:uniqueKey];
         if (!anonymous) {