使用golang在PostgreSQL中插入记录

Question

I am using below goroutinue to inset record in PostgreSQL. After execution, I see records inserting twice. Any issue with below code ? can someone suggest.

func main() {
  // create the statement string
  var sStmt string = "INSERT INTO LOGINS (id,login_name,password)   values ($1, $2,$3)"

  psqlInfo := fmt.Sprintf("host=%s port=%d user=%s "+
    "password=%s dbname=%s sslmode=disable",
    host, port, user, password, dbname)
  db, err := sql.Open("postgres", psqlInfo)

  if err != nil {
    log.Fatal(err)
  }

  stmt, err := db.Prepare(sStmt)
  if err != nil {
    log.Fatal(err)
  }

  fmt.Printf("StartTime: %v
", time.Now())

  res, err := stmt.Exec(2000,"test","test")
  fmt.Println("inserting")
  if err != nil || res == nil {
    log.Fatal(err)
  }
  stmt.Close()
  db.Close()

  fmt.Printf("StopTime: %v
", time.Now())
}