feat(server): log number of roles read from auth file

internal/server/logger.go

@@ -15,6 +15,7 @@ type infoWarner interface {
 
 type infoer interface {
 	Info(s string)
+	Infof(format string, args ...any)
 }
 
 type warner interface {

internal/server/middlewares/auth/configfile.go

@@ -13,9 +13,6 @@ import (
 func Read(filepath string) (settings Settings, err error) {
 	file, err := os.Open(filepath)
 	if err != nil {
-		if errors.Is(err, os.ErrNotExist) {
-			return Settings{}, nil
-		}
 		return settings, fmt.Errorf("opening file: %w", err)
 	}
 	decoder := toml.NewDecoder(file)

internal/server/server.go

@@ -2,7 +2,9 @@ package server
 
 import (
 	"context"
+	"errors"
 	"fmt"
+	"os"
 
 	"github.com/qdm12/gluetun/internal/httpserver"
 	"github.com/qdm12/gluetun/internal/models"
@@ -17,8 +19,12 @@ func New(ctx context.Context, address string, logEnabled bool, logger Logger,
 	server *httpserver.Server, err error,
 ) {
 	authSettings, err := auth.Read(authConfigPath)
-	if err != nil {
+	switch {
+	case errors.Is(err, os.ErrNotExist): // no auth file present
+	case err != nil:
 		return nil, fmt.Errorf("reading auth settings: %w", err)
+	default:
+		logger.Infof("read %d roles from authentication file", len(authSettings.Roles))
 	}
 	authSettings.SetDefaults()
 	err = authSettings.Validate()