Feature Request: Manage Group members snippets

[StevenACoffman]

I would really appreciate some Golang snippets demonstrating manage-group-members operations, especially checking group membership, adding members to a group.

package google_groups_sync

import (
	"context"
	"io/ioutil"
	"log"
	"strings"
	"time"

	"github.com/dxe/adb/config"
	"github.com/dxe/adb/model"
	"github.com/jmoiron/sqlx"
	"github.com/pkg/errors"

	"golang.org/x/oauth2/google"
	admin "google.golang.org/api/admin/directory/v1"
)

func getAdminService() (*admin.Service, error) {
	key, err := ioutil.ReadFile(config.SyncMailingListsConfigFile)
	if err != nil {
		return nil, errors.Wrap(err, "Could not read google auth key")
	}
	oauthConfig, err := google.JWTConfigFromJSON(key, "https://www.googleapis.com/auth/admin.directory.group")
	if err != nil {
		return nil, errors.Wrap(err, "Could not read JWT config from google auth key")
	}
	oauthConfig.Subject = config.SyncMailingListsOauthSubject

	client := oauthConfig.Client(context.Background())
	adminService, err := admin.New(client)
	if err != nil {
		return nil, errors.Wrap(err, "Could not construct admin service")
	}

	return adminService, nil
}

func listMembers(adminService *admin.Service, groupEmail string) ([]string, error) {
	var memberEmails []string
	call := adminService.Members.List(groupEmail)
	err := call.Pages(context.Background(), func(members *admin.Members) error {
		for _, m := range members.Members {
			memberEmails = append(memberEmails, m.Email)
		}
		return nil
	})
	if err != nil {
		return nil, errors.Wrapf(err, "Could not page members for group %s", groupEmail)
	}
	return memberEmails, nil
}

func insertMember(adminService *admin.Service, groupEmail, memberEmail string) error {
	_, err := adminService.Members.Insert(groupEmail, &admin.Member{Email: memberEmail}).Do()
	return errors.Wrapf(err, "Could not insert member %s into group %s ", memberEmail, groupEmail)
}

func removeMember(adminService *admin.Service, groupEmail, memberEmail string) error {
	err := adminService.Members.Delete(groupEmail, memberEmail).Do()
	return errors.Wrapf(err, "Could not delete member %s from group %s", memberEmail, groupEmail)
}
// something something main mumble unit tests 

[StevenACoffman]

Oh, here's a good example: admin sdk client