Add google.auth.transport and google.auth.exceptions (#9)
diff --git a/google/auth/exceptions.py b/google/auth/exceptions.py
new file mode 100644
index 0000000..dedde9e
--- /dev/null
+++ b/google/auth/exceptions.py
@@ -0,0 +1,32 @@
+# Copyright 2016 Google Inc.
+#
+# 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.
+
+"""Exceptions used in the google.auth package."""
+
+
+class GoogleAuthError(Exception):
+ """Base class for all google.auth errors."""
+
+
+class TransportError(Exception):
+ """Used to indicate an error occurred during an HTTP request."""
+
+
+class RefreshError(GoogleAuthError):
+ """Used to indicate that an refreshing the credentials' access token
+ failed."""
+
+
+class DefaultCredentialsError(GoogleAuthError):
+ """Used to indicate that acquiring default credentials failed."""