func (d *DNSProvider) CleanUp(domain, token, keyAuth string) error {
	fqdn, _ := dns01.GetRecord(domain, keyAuth)
	return d.cleanupTXTRecord(fqdn, domain)
}
CleanUp removes the TXT record matching the specified parameters.
package sakuracloud
import (
	"errors"
	"fmt"
	"net/http"
	"time"
	"github.com/go-acme/lego/v4/challenge/dns01"
	"github.com/go-acme/lego/v4/platform/config/env"
	"github.com/sacloud/libsacloud/api"
)
const (
	envNamespace = "SAKURACLOUD_"
	EnvAccessToken       = envNamespace + "ACCESS_TOKEN"
	EnvAccessTokenSecret = envNamespace + "ACCESS_TOKEN_SECRET"
	EnvTTL                = envNamespace + "TTL"
	EnvPropagationTimeout = envNamespace + "PROPAGATION_TIMEOUT"
	EnvPollingInterval    = envNamespace + "POLLING_INTERVAL"
	EnvHTTPTimeout        = envNamespace + "HTTP_TIMEOUT"
)
type Config struct {
	Token              string
	Secret             string
	PropagationTimeout time.Duration
	PollingInterval    time.Duration
	TTL                int
	HTTPClient         *http.Client
}
func NewDefaultConfig() *Config {
	return &Config{
		TTL:                env.GetOrDefaultInt(EnvTTL, dns01.DefaultTTL),
		PropagationTimeout: env.GetOrDefaultSecond(EnvPropagationTimeout, dns01.DefaultPropagationTimeout),
		PollingInterval:    env.GetOrDefaultSecond(EnvPollingInterval, dns01.DefaultPollingInterval),
		HTTPClient: &http.Client{
			Timeout: env.GetOrDefaultSecond(EnvHTTPTimeout, 10*time.Second),
		},
	}
}
type DNSProvider struct {
	config *Config
	client *api.DNSAPI
}
func NewDNSProvider() (*DNSProvider, error) {
	values, err := env.Get(EnvAccessToken, EnvAccessTokenSecret)
	if err != nil {
		return nil, fmt.Errorf("sakuracloud: %w", err)
	}
	config := NewDefaultConfig()
	config.Token = values[EnvAccessToken]
	config.Secret = values[EnvAccessTokenSecret]
	return NewDNSProviderConfig(config)
}
func NewDNSProviderConfig(config *Config) (*DNSProvider, error) {
	if config == nil {
		return nil, errors.New("sakuracloud: the configuration of the DNS provider is nil")
	}
	if config.Token == "" {
		return nil, errors.New("sakuracloud: AccessToken is missing")
	}
	if config.Secret == "" {
		return nil, errors.New("sakuracloud: AccessSecret is missing")
	}
	apiClient := api.NewClient(config.Token, config.Secret, "is1a")
	if config.HTTPClient == nil {
		apiClient.HTTPClient = http.DefaultClient
	} else {
		apiClient.HTTPClient = config.HTTPClient
	}
	return &DNSProvider{
		client: apiClient.GetDNSAPI(),
		config: config,
	}, nil
}
func (d *DNSProvider) Present(domain, token, keyAuth string) error {
	fqdn, value := dns01.GetRecord(domain, keyAuth)
	return d.addTXTRecord(fqdn, domain, value, d.config.TTL)
}