You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: CognitoListUsers.go
    path of file: ./repos/aws-doc-sdk-examples/go/example_code/cognito
    
    the code of the file until where you have to start completion: // Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
// SPDX-License-Identifier: Apache-2.0
// snippet-start:[cognito.go.list_users.complete]
package main

// snippet-start:[cognito.go.list_users.imports]
import (
	"github.com/aws/aws-sdk-go/aws/session"
	"github.com/aws/aws-sdk-go/service/cognitoidentityprovider"

	"flag"
	"fmt"
	"os"
)

// snippet-end:[cognito.go.list_users.imports]

func main() {
	// snippet-start:[cognito.go.list_users.vars]
	userPoolIDPtr := flag.String("p", "", "The ID of the user pool")

	flag.Parse()

	if *userPoolIDPtr == "" {
		fmt.Println("You must supply a user pool ID")
		fmt.Println("Usage: go run CreateUser.go -p USER-POOL-ID")
		
    
func main() {
	// snippet-start:[cognito.go.list_users.vars]
	userPoolIDPtr := flag.String("p", "", "The ID of the user pool")

	flag.Parse()

	if *userPoolIDPtr == "" {
		fmt.Println("You must supply a user pool ID")
		fmt.Println("Usage: go run CreateUser.go -p USER-POOL-ID")
		os.Exit(1)
	}
	// snippet-end:[cognito.go.list_users.vars]

	// Initialize a session that the SDK will use to load
	// credentials from the shared credentials file ~/.aws/credentials.
	// snippet-start:[cognito.go.list_users.session]
	sess := session.Must(session.NewSessionWithOptions(session.Options{
		SharedConfigState: session.SharedConfigEnable,
	}))
	// snippet-end:[cognito.go.list_users.session]

	// snippet-start:[cognito.go.list_users.list]
	cognitoClient := cognitoidentityprovider.New(sess)

	results, err := cognitoClient.ListUsers(
		&cognitoidentityprovider.ListUsersInput{
			UserPoolId: userPoolIDPtr})
	if err != nil {
		fmt.Println("Got error listing users")
		os.Exit(1)
	}

	// Show their names an email addresses
	for _, user := range results.Users {
		attributes := user.Attributes

		for _, a := range attributes {
			if *a.Name == "name" {
				fmt.Println("Name:  " + *a.Value)
			} else if *a.Name == "email" {
				fmt.Println("Email: " + *a.Value)
			}
		}

		fmt.Println("")
	}
	// snippet-end:[cognito.go.list_users.list]
}