address PR feedback

Author: ohmayr

google/api_core/client_logging.py

@@ -12,11 +12,18 @@
     "httpRequest",
     "rpcName",
     "serviceName",
+    "credentialsType",
+    "credentialInfo",
+    "universeDomain",
+    "request",
+    "response",
+    "metadata",
+    "retryAttempt",
 ]  # Additional fields to be Logged.
 
 
 # TODO(https://github.com/googleapis/python-api-core/issues/763): Add documentation.
-def logger_configured(logger):
+def logger_configured(logger) -> bool:
     return (
         logger.handlers != [] or logger.level != logging.NOTSET or not logger.propagate
     )
@@ -55,7 +62,7 @@ def configure_defaults(logger):
 
 
 # TODO(https://github.com/googleapis/python-api-core/issues/763): Add documentation.
-def setup_logging(scopes=""):
+def setup_logging(scopes: str=""):
 
     # only returns valid logger scopes (namespaces)
     # this list has at most one element.
@@ -78,7 +85,7 @@ def setup_logging(scopes=""):
 class StructuredLogFormatter(logging.Formatter):
     # TODO(https://github.com/googleapis/python-api-core/issues/761): ensure that additional fields such as
     # function name, file name, and line no. appear in a log output.
-    def format(self, record):
+    def format(self, record: logging.LogRecord):
         log_obj = {
             "timestamp": self.formatTime(record),
             "severity": record.levelname,