register alias

- (void)application:(UIApplication *)application didRegisterForRemoteNotificationsWithDeviceToken:(NSData *)deviceToken {
    CCHNotificationService *sharedService = [CCHNotificationService sharedService];
    NSString *deviceID = [ContextHub deviceId];

    [sharedService registerDeviceToken:deviceToken withAlias:deviceID withCompletion:^(NSError *error) {
        if(error) {
            NSLog(@"%@", error);
        } else { 
            NSLog(@"Success :)");
        }
    }];
}