error handling

dropbox_handler.py

@@ -127,6 +127,9 @@ def restoreFolder(dropboxFolder):
     except dropbox.exceptions.ApiError as err:
         print('Folder listing failed for', dropboxFolder, '-- assumed empty:', err)
         return
+    except dropbox.exceptions.AuthError as err1:
+        print('Folder listing failed for', dropboxFolder, '-- assumed empty:', err1)
+        return
     for entry in res.entries:
         if (isinstance(entry, dropbox.files.FileMetadata)):
             restoreFile(entry.path_display)