Added check to not overwrite config file

internal/util/util.go

@@ -4,6 +4,7 @@ import (
 	"encoding/base64"
 	"math/rand"
 	"net/url"
+	"os"
 	"strings"
 )
 
@@ -46,3 +47,14 @@ func EncodeURL(s string) string {
 func EncodeBase64(s string) string {
 	return base64.StdEncoding.EncodeToString([]byte(s))
 }
+
+func PathExists(path string) (bool, error) {
+	_, err := os.Stat(path)
+	if err == nil {
+		return true, nil
+	}
+	if os.IsNotExist(err) {
+		return false, nil
+	}
+	return false, err
+}