func main() {
  fileName := "amazon_products.csv"
  file, err := os.Create(fileName)
  if err != nil {
    log.Fatalf("Could not create %s", fileName)
  }
  defer file.Close()

  writer := csv.NewWriter(file)
  defer writer.Flush()

  writer.Write([]string{"Product Name", "Stars", "Price"})
  // ...
}