diff --git a/app/rest/api/rest.go b/app/rest/api/rest.go
index 169c41f6..5ca7d7a4 100644
--- a/app/rest/api/rest.go
+++ b/app/rest/api/rest.go
@@ -217,6 +217,7 @@ func (s *Rest) createCommentCtrl(w http.ResponseWriter, r *http.Request) {
 	render.JSON(w, r, &finalComment)
 }
 
+// POST /preview, body is a comment
 func (s *Rest) previewCommentCtrl(w http.ResponseWriter, r *http.Request) {
 	comment := store.Comment{}
 	if err := render.DecodeJSON(http.MaxBytesReader(w, r.Body, hardBodyLimit), &comment); err != nil {
diff --git a/app/rest/auth/provider.go b/app/rest/auth/provider.go
index 658c00ef..07275cdd 100644
--- a/app/rest/auth/provider.go
+++ b/app/rest/auth/provider.go
@@ -55,6 +55,7 @@ func (u userData) value(key string) string {
 
 // newProvider makes auth for given provider
 func initProvider(p Params, provider Provider) Provider {
+	log.Printf("[INFO] init auth provider %s", provider.Name)
 	provider.Params = p
 	provider.conf = oauth2.Config{
 		ClientID:     provider.Cid,
@@ -64,7 +65,7 @@ func initProvider(p Params, provider Provider) Provider {
 		Endpoint:     provider.Endpoint,
 	}
 
-	log.Printf("[INFO] create %s auth, id=%s, redir: %s, endpoint: %s",
+	log.Printf("[DEBUG] created %s auth, id=%s, redir=%s, endpoint=%s",
 		provider.Name, provider.Cid, provider.Endpoint, provider.RedirectURL)
 	return provider
 }