NSURL *URLByModifyingParameters(NSURL *url, void (^block)(NSMutableDictionary *parameters)) {
    NSMutableString *urlString = url.absoluteString.mutableCopy;
    NSMutableDictionary *parameters = [NSMutableDictionary new];
    block(parameters);
    NSMutableString *postString = [NSMutableString new];
    [parameters enumerateKeysAndObjectsUsingBlock:^(id  _Nonnull key, id  _Nonnull value, BOOL * _Nonnull stop) {
        if (postString.length) {
            [postString appendString:@"&"];
        }

        if ([value isKindOfClass:NSString.class]) {
            NSString *paramValue = [value urlEncodeUsingEncoding:NSUTF8StringEncoding];
            [postString appendString:[NSString stringWithFormat:@"%@=%@", key, paramValue]];
        } else {
            [postString appendString:[NSString stringWithFormat:@"%@=%@", key, value]];
        }
    }];
    return [NSURL URLWithString:[urlString stringByAppendingString:postString]];
}