Title

package main
 
import (
	"encoding/json"
	"flag"
	"fmt"
	"os"
)
 
func parseFlags() string {
	inputFile := flag.String("input", "", "Input file name")
	flag.Parse()
	return *inputFile
}
 
func main() {
	inputFile := parseFlags()
 
	if inputFile == "" {
		fmt.Println("No configuration file given")
		fmt.Println("Usage: app -input <file-name>")
		os.Exit(1)
	}
 
	type user struct {
		Name    string `json:"name"`
		Address string `json:"address"`
	}
 
	var userData []user
 
	content, err := os.ReadFile(inputFile)
	if err != nil {
		fmt.Println(err.Error())
		os.Exit(1)
	}
 
	err = json.Unmarshal(content, &userData)
	if err != nil {
		fmt.Println(err.Error())
		os.Exit(1)
	}
 
	for _, u := range userData {
		fmt.Printf("%s : %s\n", u.Name, u.Address)
	}
}

[
  {
    "name": "user 1",
    "address": "address of user 1"
  },
  {
    "name": "user 2",
    "address": "address of user 2"
  },
  {
    "name": "user 3",
    "address": "address of user 3"
  },
  {
    "name": "user 4",
    "address": "address of user 4"
  },
  {
    "name": "user 5",
    "address": "address of user 5"
  }
]