Azure Blob Storage Access Issues via Private Endpoint in Azure DevOps Pipeline

I’m facing issues accessing Azure Blob Storage via a private endpoint using a SAS token within an Azure DevOps pipeline. Despite configuring the private endpoint, the SAS token, and the pipeline correctly, I encounter AuthorizationFailure errors when the pipeline tries to perform blob operations like reading and writing. The error message:

azure.core.exceptions.HttpResponseError: This request is not authorized to perform this operation.
RequestId:70336d7b-201e-005c-179d-938271000000
Time:2024-04-21T03:36:35.5944080Z
ErrorCode:AuthorizationFailure
Content: <?xml version="1.0" encoding="utf-8"?><Error><Code>AuthorizationFailure</Code><Message>This request is not authorized to perform this operation. RequestId:70336d7b-201e-005c-179d-938271000000 Time:2024-04-21T03:36:35.5944080Z</Message></Error>

The code:

from azure.storage.blob import BlobServiceClient, generate_account_sas, ResourceTypes, AccountSasPermissions
from datetime import datetime, timedelta
import pandas as pd
from io import BytesIO

ACCOUNT_NAME = "****"
CONTAINER_NAME = "****"
account_url = f"https://{ACCOUNT_NAME}.blob.core.windows.net"
account_key = '****'

sas_token = generate_account_sas(
    account_name=ACCOUNT_NAME,
    account_key=account_key,
    resource_types=ResourceTypes(container=True, object=True),
    permission=AccountSasPermissions(read=True, write=True, list=True),
    expiry=datetime.utcnow() + timedelta(hours=1)
)

I think the problem is that my Blob is "Private" and firewall blocked for everyone. I have an private end point, but how to use it into the Azure Pipeline, is it possible?