func (d *DNSProvider) CleanUp(domain, token, keyAuth string) error {
	fqdn, value := dns01.GetRecord(domain, keyAuth)
	authZone, err := dns01.FindZoneByFqdn(fqdn)
	if err != nil {
		return fmt.Errorf("mythicbeasts: %w", err)
	}
	leaf := fqdn[:len(fqdn)-(len(authZone)+1)]
	authZone = dns01.UnFqdn(authZone)
	err = d.login()
	if err != nil {
		return fmt.Errorf("mythicbeasts: %w", err)
	}
	err = d.removeTXTRecord(authZone, leaf, value)
	if err != nil {
		return fmt.Errorf("mythicbeasts: %w", err)
	}
	return nil
}
CleanUp removes the TXT record matching the specified parameters.
package mythicbeasts
import (
	"errors"
	"fmt"
	"net/http"
	"net/url"
	"time"
	"github.com/go-acme/lego/v4/challenge/dns01"
	"github.com/go-acme/lego/v4/platform/config/env"
)
const (
	envNamespace = "MYTHICBEASTS_"
	EnvUserName        = envNamespace + "USERNAME"
	EnvPassword        = envNamespace + "PASSWORD"
	EnvAPIEndpoint     = envNamespace + "API_ENDPOINT"
	EnvAuthAPIEndpoint = envNamespace + "AUTH_API_ENDPOINT"
	EnvTTL                = envNamespace + "TTL"
	EnvPropagationTimeout = envNamespace + "PROPAGATION_TIMEOUT"
	EnvPollingInterval    = envNamespace + "POLLING_INTERVAL"
	EnvHTTPTimeout        = envNamespace + "HTTP_TIMEOUT"
)
type Config struct {
	UserName           string
	Password           string
	HTTPClient         *http.Client
	PropagationTimeout time.Duration
	PollingInterval    time.Duration
	APIEndpoint        *url.URL
	AuthAPIEndpoint    *url.URL
	TTL                int
}
func NewDefaultConfig() (*Config, error) {
	apiEndpoint, err := url.Parse(env.GetOrDefaultString(EnvAPIEndpoint, apiBaseURL))
	if err != nil {
		return nil, fmt.Errorf("mythicbeasts: Unable to parse API URL: %w", err)
	}
	authEndpoint, err := url.Parse(env.GetOrDefaultString(EnvAuthAPIEndpoint, authBaseURL))
	if err != nil {
		return nil, fmt.Errorf("mythicbeasts: Unable to parse AUTH API URL: %w", err)
	}
	return &Config{
		TTL:                env.GetOrDefaultInt(EnvTTL, dns01.DefaultTTL),
		PropagationTimeout: env.GetOrDefaultSecond(EnvPropagationTimeout, dns01.DefaultPropagationTimeout),
		PollingInterval:    env.GetOrDefaultSecond(EnvPollingInterval, dns01.DefaultPollingInterval),
		APIEndpoint:        apiEndpoint,
		AuthAPIEndpoint:    authEndpoint,
		HTTPClient: &http.Client{
			Timeout: env.GetOrDefaultSecond(EnvHTTPTimeout, 10*time.Second),
		},
	}, nil
}
type DNSProvider struct {
	config *Config
	token  string
}
func NewDNSProvider() (*DNSProvider, error) {
	values, err := env.Get(EnvUserName, EnvPassword)
	if err != nil {
		return nil, fmt.Errorf("mythicbeasts: %w", err)
	}
	config, err := NewDefaultConfig()
	if err != nil {
		return nil, fmt.Errorf("mythicbeasts: %w", err)
	}
	config.UserName = values[EnvUserName]
	config.Password = values[EnvPassword]
	return NewDNSProviderConfig(config)
}
func NewDNSProviderConfig(config *Config) (*DNSProvider, error) {
	if config == nil {
		return nil, errors.New("mythicbeasts: the configuration of the DNS provider is nil")
	}
	if config.UserName == "" || config.Password == "" {
		return nil, errors.New("mythicbeasts: incomplete credentials, missing username and/or password")
	}
	return &DNSProvider{config: config}, nil
}
func (d *DNSProvider) Present(domain, token, keyAuth string) error {
	fqdn, value := dns01.GetRecord(domain, keyAuth)
	authZone, err := dns01.FindZoneByFqdn(fqdn)
	if err != nil {
		return fmt.Errorf("mythicbeasts: %w", err)
	}
	leaf := fqdn[:len(fqdn)-(len(authZone)+1)]
	authZone = dns01.UnFqdn(authZone)
	err = d.login()
	if err != nil {
		return fmt.Errorf("mythicbeasts: %w", err)
	}
	err = d.createTXTRecord(authZone, leaf, value)
	if err != nil {
		return fmt.Errorf("mythicbeasts: %w", err)
	}
	return nil
}