Update checked in version of gsutil to version 4.6

gslib/cred_types.py

+# -*- coding: utf-8 -*-
 # Copyright 2013 Google Inc. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
 # You may obtain a copy of the License at
 #
 #     http://www.apache.org/licenses/LICENSE-2.0
 #
 # Unless required by applicable law or agreed to in writing, software
 # distributed under the License is distributed on an "AS IS" BASIS,
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
+"""Defines gsutil-supported credential types."""
 
-class CredTypes:
-  HMAC, OAUTH2_SERVICE_ACCOUNT, OAUTH2_USER_ACCOUNT = range(3)
+from __future__ import absolute_import
+
+
+class CredTypes(object):
+  HMAC = "HMAC"
+  OAUTH2_SERVICE_ACCOUNT = "OAuth 2.0 Service Account"
+  OAUTH2_USER_ACCOUNT = "Oauth 2.0 User Account"
+  GCE = "GCE"