Used Credentials instead of token (gcsgs lib requires either Credentials or path to SA file)

(cherry picked from commit defe99a7)

osdu_gcp/storage/dask_storage_parameters.py

@@ -2,14 +2,9 @@ from typing import Optional
 from osdu.core.api.storage.dask_storage_parameters import DaskStorageParameters
 from osdu.core.api.storage.tenant import Tenant
 
-from .blob_storage_gcp import GCloudAioStorage
-
 
 async def get_dask_storage_parameters(tenant: Tenant, directory: Optional[str] = None) -> DaskStorageParameters:
-    gcp_store = GCloudAioStorage(service_account_file=tenant.credentials)
-    token = await gcp_store._get_access_token(tenant.project_id, tenant.bucket_name)
-    storage_options = {'token': token}
-
+    storage_options = {'token': tenant.credentials}
     base_directory = f'{tenant.bucket_name}/{directory}' if directory else tenant.bucket_name
 
     return DaskStorageParameters(protocol='gs',