logging get_credentials in azure blob client

osdu_az/storage/blob_storage_az.py

+import logging
 from typing import Optional, List, Any
 
 from azure.storage.blob.aio import BlobServiceClient
@@ -18,6 +19,8 @@ from osdu.core.api.storage.exceptions import (
 
 from osdu_az.partition.partition_service import PartitionService
 
+_LOGGER = logging.getLogger(__name__)
+
 
 class AzureAioBlobStorage(BlobStorageBase):
     """
@@ -46,10 +49,13 @@ class AzureAioBlobStorage(BlobStorageBase):
 
     def _get_credentials(self):
         if AzureAioBlobStorage.Credentials is None:
+            _LOGGER.info(f"Acquire new Credentials using DefaultAzureCredential")
             AzureAioBlobStorage.Credentials = DefaultAzureCredential(
                 exclude_shared_token_cache_credential=True,
                 exclude_visual_studio_code_credential=True,
                 exclude_environment_credential=True)
+        else:
+            _LOGGER.info(f"Using cached Credentials")
         return AzureAioBlobStorage.Credentials
 
     async def _get_blob_service_client(self, tenant):
@@ -61,6 +67,7 @@ class AzureAioBlobStorage(BlobStorageBase):
     @classmethod
     async def close_credentials(cls):
         """ This cause to gracefully dispose credentials if any. Next calls will then initialize a new one """
+        _LOGGER.info(f"Closing cached Credentials")
         credentials_to_close, cls.Credentials = cls.Credentials, None  # swap
         if credentials_to_close is not None:
             await credentials_to_close.close()