Go 템플릿의 외부 범위에서 변수에 액세스하는 방법은 무엇입니까?

type User struct {
    Username string
    Password []byte
    Email string
}

func main() {
    users := []User{{"user1", []byte("password"), "user1@example.com"}, {"user2", []byte("password"), "user2@example.com"}}
    renderer.HTML(w, http.StatusOK, "users/index", map[string]interface{}{
        "lang":  "en",
        "users": users,
    })
}

{{ range .users }}
  <form action="/{{ .lang }}/users" method="POST">
    <input type="text" name="Username" value="{{ .Username }}">
    <input type="text" name="Email" value="{{ .Email }}">
  </form>
{{ end }}

{{ range .users }}
  <form action="/{{ $.lang }}/users" method="POST">
    <input type="text" name="Username" value="{{ .Username }}">
    <input type="text" name="Email" value="{{ .Email }}">
  </form>
{{ end }}