fixed backup_restore_operations
# ------------------------------------
import asyncio
import os
-from azure.keyvault.certificates.aio import CertificateClient, CertificatePolicy
+from azure.keyvault.certificates.aio import CertificateClient
+from azure.keyvault.certificates import CertificatePolicy
from azure.identity.aio import DefaultAzureCredential
from azure.core.exceptions import HttpResponseError
