Facebook SDK 3.1 for iOS - get a list of friends using the app

FBiOSFriendsAppUsers

- (void) getAppUsers {
    FBRequest *appUsersRequest = [[FBRequest alloc]
                                  initWithSession:FBSession.activeSession
                                  restMethod:@"friends.getAppUsers"
                                  parameters:nil
                                  HTTPMethod:@"GET"];
    FBRequestConnection *appUsersConnection = [[FBRequestConnection alloc] init];
    [appUsersConnection
     addRequest:appUsersRequest
     completionHandler:^(FBRequestConnection *connection, id result, NSError *error) {
         // Process the results
         NSMutableArray *friendsWithApp = [[NSMutableArray alloc] init];
         // Many results
         if ([result isKindOfClass:[NSArray class]]) {
             [friendsWithApp addObjectsFromArray:result];
         } else if ([result isKindOfClass:[NSDecimalNumber class]]) {
             [friendsWithApp addObject: [result stringValue]];
         }
    }];
    [appUsersConnection start];
}