🦉 Updates from OwlBot post-processor

See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md

Author: gcf-owl-bot[bot]

google/pubsub_v1/services/publisher/client.py

@@ -14,6 +14,8 @@
 # limitations under the License.
 #
 from collections import OrderedDict
+from http import HTTPStatus
+import json
 import logging as std_logging
 import functools
 import os
@@ -534,6 +536,33 @@ def _validate_universe_domain(self):
         # NOTE (b/349488459): universe validation is disabled until further notice.
         return True
 
+    def _add_cred_info_for_auth_errors(
+        self, error: core_exceptions.GoogleAPICallError
+    ) -> None:
+        """Adds credential info string to error details for 401/403/404 errors.
+
+        Args:
+            error (google.api_core.exceptions.GoogleAPICallError): The error to add the cred info.
+        """
+        if error.code not in [
+            HTTPStatus.UNAUTHORIZED,
+            HTTPStatus.FORBIDDEN,
+            HTTPStatus.NOT_FOUND,
+        ]:
+            return
+
+        cred = self._transport._credentials
+
+        # get_cred_info is only available in google-auth>=2.35.0
+        if not hasattr(cred, "get_cred_info"):
+            return
+
+        # ignore the type check since pypy test fails when get_cred_info
+        # is not available
+        cred_info = cred.get_cred_info()  # type: ignore
+        if cred_info and hasattr(error._details, "append"):
+            error._details.append(json.dumps(cred_info))
+
     @property
     def api_endpoint(self):
         """Return the API endpoint used by the client instance.
@@ -1868,16 +1897,20 @@ def set_iam_policy(
         # Validate the universe domain.
         self._validate_universe_domain()
 
-        # Send the request.
-        response = rpc(
-            request,
-            retry=retry,
-            timeout=timeout,
-            metadata=metadata,
-        )
+        try:
+            # Send the request.
+            response = rpc(
+                request,
+                retry=retry,
+                timeout=timeout,
+                metadata=metadata,
+            )
 
-        # Done; return the response.
-        return response
+            # Done; return the response.
+            return response
+        except core_exceptions.GoogleAPICallError as e:
+            self._add_cred_info_for_auth_errors(e)
+            raise e
 
     def get_iam_policy(
         self,
@@ -1995,16 +2028,20 @@ def get_iam_policy(
         # Validate the universe domain.
         self._validate_universe_domain()
 
-        # Send the request.
-        response = rpc(
-            request,
-            retry=retry,
-            timeout=timeout,
-            metadata=metadata,
-        )
+        try:
+            # Send the request.
+            response = rpc(
+                request,
+                retry=retry,
+                timeout=timeout,
+                metadata=metadata,
+            )
 
-        # Done; return the response.
-        return response
+            # Done; return the response.
+            return response
+        except core_exceptions.GoogleAPICallError as e:
+            self._add_cred_info_for_auth_errors(e)
+            raise e
 
     def test_iam_permissions(
         self,
@@ -2060,16 +2097,20 @@ def test_iam_permissions(
         # Validate the universe domain.
         self._validate_universe_domain()
 
-        # Send the request.
-        response = rpc(
-            request,
-            retry=retry,
-            timeout=timeout,
-            metadata=metadata,
-        )
+        try:
+            # Send the request.
+            response = rpc(
+                request,
+                retry=retry,
+                timeout=timeout,
+                metadata=metadata,
+            )
 
-        # Done; return the response.
-        return response
+            # Done; return the response.
+            return response
+        except core_exceptions.GoogleAPICallError as e:
+            self._add_cred_info_for_auth_errors(e)
+            raise e
 
 
 DEFAULT_CLIENT_INFO = gapic_v1.client_info.ClientInfo(