$ go get github.com/munsy/battlenet

package main

import (
        "flag"
        "fmt"
        "net/http"
        "time"

        "github.com/munsy/battlenet"
)

var tokenFlag = flag.String("t", "", "Battle.net API token (required).")

func main() {
        flag.Parse()

        if *tokenFlag == "" {
                fmt.Println("No token provided.")
                return
        }

        // Create settings for the client. This is not required, but
        // is necessary for non-default settings.
        settings := &battlenet.Settings{
                Client: &http.Client{Timeout: (10 * time.Second)},
                Locale: battlenet.Locale.AmericanEnglish,
                Region: battlenet.Regions.US,
        }

        // Create a new client for accessing the Battle.net Account API.
        // There are also clients for Diablo III, Starcraft II, and WoW.
        client, err := battlenet.AccountClient(settings, *tokenFlag)

        if nil != err {
                panic(err)
        }

        // Make a request. Each method corresponds to a Battle.net endpoint.
        response, err := client.BattleID()

        if nil != err {
                panic(err)
        }

        // Get the underlying data. You can also see the endpoint that was called,
        // as well as your quota usage.
        bid := response.Data

        fmt.Printf("ID: %d\n", bid.ID)
        fmt.Printf("BattleTag: %s\n", bid.BattleTag)
}

$ go build -o account.exe
$ ./account.exe -t $YOUR_API_TOKEN_HERE
ID: 12345654321
BattleTag: Munsy#78910