Help using apify proxy without sdk

func NewApifyProxyClientFromEnv() (*ApifyProxyClient, error) {
    hostname := os.Getenv("APIFY_PROXY_HOSTNAME")
    port := os.Getenv("APIFY_PROXY_PORT")
    password := os.Getenv("APIFY_PROXY_PASSWORD")

    // Dump all environment variables for debugging
    proxyClientLog.Debug("Dumping all environment variables:")
    for _, env := range os.Environ() {
        if strings.Contains(env, "APIFY_PROXY_PASSWORD") {
            proxyClientLog.Debugf("  %s=********", strings.SplitN(env, "=", 2)[0])
        } else {
            proxyClientLog.Debugf("  %s", env)
        }
    }

    if hostname == "" || port == "" || password == "" {
        return nil, fmt.Errorf("APIFY_PROXY_HOSTNAME, APIFY_PROXY_PORT, or APIFY_PROXY_PASSWORD environment variables not set")
    }

    groups := []string{"BUYPROXIES94952"} 
    if groupsStr := os.Getenv("APIFY_PROXY_GROUPS"); groupsStr != "" {
        groups = strings.Split(groupsStr, ",")
    }

    return NewApifyProxyClient(hostname, port, password, groups, "", ""), nil // Pass empty strings for session and country
}