Stackoverflow #55345991

main.go

package main

import (
    "fmt"
    "io/ioutil"
    "log"

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

func main() {
    serviceAccountFile := "./credentials.json"
    serviceAccountJSON, err := ioutil.ReadFile(serviceAccountFile)
    if err != nil {
        log.Fatal(err)
    }

    config, err := google.JWTConfigFromJSON(serviceAccountJSON,
        admin.AdminDirectoryUserScope,
    )

    config.Subject = "[[ADMIN-USER]]@[[DOMAIN]]"

    srv, err := admin.New(config.Client(context.Background()))
    if err != nil {
        log.Fatal(err)
    }

    usersReport, err := srv.Users.List().Customer("[[IDPID]]").MaxResults(10).OrderBy("email").Do()
    if err != nil {
        log.Fatal(err)
    }

    if len(usersReport.Users) == 0 {
        fmt.Print("No users found.\n")
    } else {
        fmt.Print("Users:\n")
        for _, u := range usersReport.Users {
            fmt.Printf("%s (%s)\n", u.PrimaryEmail, u.Name.FullName)
        }
    }
}