```go import ( "context" "fmt" "io" admin "google.golang.org/api/admin/directory/v1" ) // listUsers lists all users. func listUsers(w io.Writer, adminService admin.Service) error { ctx := context.Background() resp, err := adminService.Users.List().Do() if err != nil { return fmt.Errorf("Users.List: %v", err) } if len(resp.Users) > 0 { fmt.Fprintln(w, "Users:") for _, user := range resp.Users { fmt.Fprintln(w, user.Name.FullName) } } else { fmt.Fprintln(w, "No users found.") } return nil } ```
