fix(keystone): avoid panic when call logclient

pkg/mcclient/auth/auth.go

@@ -278,7 +278,7 @@ func GetTokenString() string {
 }
 
 func IsAuthed() bool {
-	return manager.isAuthed()
+	return manager != nil && manager.isAuthed()
 }
 
 func Client() *mcclient.Client {

pkg/util/logclient/logclient.go

@@ -161,7 +161,11 @@ func addLog(model IObject, action string, iNotes interface{}, userCred mcclient.
 	logentry.Add(jsonutils.NewString(notes), "notes")
 
 	logclientWorkerMan.Run(func() {
-		s := DefaultSessionGenerator(context.Background(), auth.AdminCredential(), "", "")
+		cred := userCred
+		if auth.IsAuthed() {
+			cred = auth.AdminCredential()
+		}
+		s := DefaultSessionGenerator(context.Background(), cred, "", "")
 		_, err := api.Create(s, logentry)
 		if err != nil {
 			log.Errorf("create action log %s failed %s", logentry, err)