package main

import (
  "fmt"
  "os"
)

var users = map[string]string{
  "305": "Sue",
  "204": "Bob",
  "631": "Jake",
  "073": "Tracy",
}

func deleteUser(id string) {

  delete(users, id)

}

func main() {

  if len(os.Args) != 2 {
    fmt.Println("User ID not passed")
    os.Exit(1)
  }

  userID := os.Args[1]
  deleteUser(userID)
  fmt.Println("Users:", users)

}