Add string method to kerberos AuthType (#47687) (#47695)

(cherry picked from commit d4ec033)

Co-authored-by: Khushi Jain <[email protected]>

Author: mergify[bot]

libbeat/common/transport/kerberos/config.go

@@ -39,6 +39,11 @@ var (
 		authPasswordStr: authPassword,
 		authKeytabStr:   authKeytab,
 	}
+
+	authTypeInverse = map[AuthType]string{
+		authPassword: authPasswordStr,
+		authKeytab:   authKeytabStr,
+	}
 )
 
 type Config struct {
@@ -69,3 +74,7 @@ func (t *AuthType) Unpack(value string) error {
 
 	return nil
 }
+
+func (t *AuthType) String() string {
+	return authTypeInverse[*t]
+}

x-pack/otel/extension/beatsauthextension/authenticator.go

@@ -126,7 +126,7 @@ func getHttpClient(a *authenticator) (roundTripperProvider, error) {
 		return nil, fmt.Errorf("failed creating config: %w", err)
 	}
 
-	beatAuthConfig := esAuthConfig{}
+	beatAuthConfig := BeatsAuthConfig{}
 	err = parsedCfg.Unpack(&beatAuthConfig)
 	if err != nil {
 		return nil, fmt.Errorf("failed unpacking config: %w", err)

x-pack/otel/extension/beatsauthextension/config.go

@@ -16,7 +16,7 @@ type Config struct {
 	ContinueOnError bool                   `mapstructure:"continue_on_error"`
 }
 
-type esAuthConfig struct {
+type BeatsAuthConfig struct {
 	Kerberos  *kerberos.Config                 `config:"kerberos"`
 	Transport httpcommon.HTTPTransportSettings `config:",inline"`
 }