NSString *UUID() {
    CFUUIDRef cfuuid = CFUUIDCreate(NULL);
    NSString *uuid =  (__bridge_transfer NSString *)CFUUIDCreateString(NULL, cfuuid);
    CFRelease(cfuuid);
    return uuid;
}

uuid = UUID();
[keychainItemWrapper setObject:uuid forKey:(__bridge_transfer id)kSecAttrAccount];
NSString *pass_token = randomString(10);
[keychainItemWrapper setObject:pass_token forKey:(__bridge_transfer id)kSecValueData];

@implementation EEUserID

+ (NSUUID *) getUUID
{
    NSUUID *uuid = nil;
    NSString *uuidString = [[NSUbiquitousKeyValueStore defaultStore] stringForKey: @"EEUserID"];
    if (uuidString == nil)
    {
        // This is our first launch for this iTunes account, so we generate random UUID and store it in iCloud:
        uuid = [NSUUID UUID];
        [[NSUbiquitousKeyValueStore defaultStore] setString: uuid.UUIDString forKey: @"EEUserID"];
        [[NSUbiquitousKeyValueStore defaultStore] synchronize];
    }
    else
    {
        uuid = [[NSUUID alloc] initWithUUIDString: uuidString];
    }

    return uuid;
}

+ (NSString *) getUUIDString
{
    NSUUID *uuid = [self getUUID];
    if (uuid != nil)
        return uuid.UUIDString;
    else
        return nil;
}

+ (void) load
{
    // get changes that might have happened while this
    // instance of your app wasn't running
    [[NSUbiquitousKeyValueStore defaultStore] synchronize];
}

@end

#import <Foundation/Foundation.h>

@interface EEUserID : NSObject

+ (NSUUID *) getUUID;
+ (NSString *) getUUIDString;

@end

NSString *uniqueIDForiTunesAccount = [EEUserID getUUIDString];

#include "OpenUDID.h"
NSString* openUDID = [OpenUDID value];