// open the key file for your GCP service account (see below how to create that key file)
jsonServiceAccount, err := ioutil.ReadFile("path\\to\\service_account_key.json")
if err != nil {
  log.Print(err.Error())
  return
}

// spreadsheet id can be taken from the URL
// example URL: https://docs.google.com/spreadsheets/d/c8ACvfAd4X09Hi9mCl4qcBidP635S8z5luk-vGG54N5T/edit#gid=0
// the spreadsheet ID would be "c8ACvfAd4X09Hi9mCl4qcBidP635S8z5lukxvGG54N5T"
sheet, err := gs.OpenSheet(context.Background(), "c8ACvfAd4X09Hi9mCl4qcBidP635S8z5luk-vGG54N5T", "Sheet1", gs.O_CREATE|gs.O_RDWR, jsonServiceAccount)
if err != nil {
  log.Print(err.Error())
  return
}
csvWriter := csv.NewWriter(sheet)
err = csvWriter.WriteAll([][]string{
  {"0", "1"},
  {"2", "3"},
})

csvReader := csv.NewReader(sheet)
csvResult, err := csvReader.ReadAll()
if err != nil {
  log.Print(err.Error())
  return
}
fmt.Printf("results: %v", csvResult)

gs.Remove(context.Background(), gs.SpreadSheetId(), gs.Id(), jsonServiceAccount)

csvReader := csv.NewReader(sheet)
csvReader.FieldsPerRecord = -1
csvResult, err := csvReader.ReadAll()
if err != nil {
  log.Print(err.Error())
  return
}
fmt.Printf("results: %v", csvResult)