- (void)loginTestWithCompletion:(void(^)(NSString *string))completion {
    NSString *login=@"***";
    NSString *password=@"***";

    NSMutableURLRequest* request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:@"http://freescribbler.com/test.php"]
                                                           cachePolicy:NSURLRequestUseProtocolCachePolicy
                                                       timeoutInterval:15.0];
    request.HTTPMethod = @"POST";
    //NSString* params = (@"act=LOGIN&username=%@&userpassword=%@&clientcode=123123123");
    NSString* params=[NSString stringWithFormat:@"act=LOGIN&username=%@&userpassword=%@&clientcode=123123123",login,password];
    request.HTTPBody = [params dataUsingEncoding:NSUTF8StringEncoding];

    NSURLSession *session = [NSURLSession sharedSession];
    NSURLSessionDataTask *dataTask = [session dataTaskWithRequest:request
                                                completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
                                                    NSString *dataString = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
                                                    NSLog(@"response %@",dataString);
                                                    if (completion) completion(dataString);
                                                        }];
    [dataTask resume];
}