Verify Google-issued OAuth2 token in Go

verify.go

package main

import (
    "fmt"
    "log"
    "net/http"

    "google.golang.org/api/oauth2/v2"
)

func main() {
    svc, e := oauth2.New(http.DefaultClient)
    if e != nil {
        log.Fatal(e)
    }
    ti, e := svc.Tokeninfo().IdToken("<token here>").Do()
    if e != nil {
        log.Fatal(e)
    }
    fmt.Println(ti.Email)
}