func main() {
    //...

    // make HTTP request
    response, err := client.Do(req)
    if err != nil {
        fmt.Println("Error:", err)
        return
    }
    // close the response body
    defer response.Body.Close()

    // read the response body
    body, err := io.ReadAll(response.Body)
    if err != nil {
        fmt.Println("Error:", err)
        return
    }

    // print the text content
    fmt.Println(string(body))
}