remove callback error redirect

auth/auth.go

@@ -4,7 +4,6 @@ import (
 	"encoding/base64"
 	"encoding/json"
 	"errors"
-	"fmt"
 	"net/http"
 	"strings"
 
@@ -127,13 +126,7 @@ func HandleAuthCallback(w http.ResponseWriter, r *http.Request) {
 //	  		oauth
 func HandleAuthLogin(w http.ResponseWriter, r *http.Request) {
 	if auth_provider == nil {
-		var referer = r.Header.Get("referer")
-		if referer != "" {
-			http.Redirect(w, r, referer+"login?oauth=callback-error", http.StatusTemporaryRedirect)
-			return
-		}
-		w.Header().Set("Content-Type", "text/html; charset=utf-8")
-		_, _ = fmt.Fprintln(w, oauthNotConfigured)
+		handleOauthNotConfigured(w)
 		return
 	}
 	var functions = getCurrentAuthFunctions()