Go command line app to get StackOverflow User Rep by Id

sofrep.go

package main

import (
	"encoding/json"
	"flag"
	"fmt"
	"net/http"
)

type sofUser struct {
	Items []struct {
		Display_name string
		Reputation   int
	}
}

// Get a StackOverflow (SOF) user's rep points user id
func main() {
	var userId string
	flag.StringVar(&userId, "u", "1", "-u=userId")
	flag.Parse()

	url := "https://api.stackexchange.com/2.2/users/" + userId + "?order=desc&sort=reputation&site=stackoverflow"

	var user sofUser
	getJsonData(url, &user)

	for _, item := range user.Items {
		fmt.Printf("SOF Rep for %s = %d\n", item.Display_name, item.Reputation)
	}
}

func getJsonData(url string, data interface{}) {
	r, _ := http.Get(url)
	defer r.Body.Close()
	dec := json.NewDecoder(r.Body)
	dec.Decode(&data)
}