golang elasticsearch read

package main

import (
    "context"
    "encoding/json"
    "fmt"
    "log"
    "os"

    "github.com/olivere/elastic"
)

func main() {
    args := os.Args

    if len(args) < 2 {
        log.Fatal("State not informed")
    }

    // check if all elasticsearch env vars were exported
    url := os.Getenv("ELASTIC_URL")
    index := os.Getenv("ELASTIC_INDEX")
    _type := os.Getenv("ELASTIC_TYPE")

    if url == "" || index == "" || _type == "" {
        log.Fatal("Please set all elastic search env vars.")
    }

    // get elastic search client
    client, _ := elastic.NewClient()
    ctx := context.Background()

    // search for state
    state, _ := client.Get().
        Index(index).
        Type(_type).
        Id(args[1]).
        Do(ctx)

    j, _ := json.Marshal(state)

    fmt.Println(string(j))
}