I want to use Python to download file from OneLake, the file was uploaded within Power BI.
I have following code:

from azure.storage.filedatalake import DataLakeServiceClient
from azure.identity import DefaultAzureCredential

WORKSPACE_NAME = "workspace_2"
DATA_PATH = "DataflowsStagingLakehouse.Lakehouse/Files/logo.png"
account_url = f"https://onelake.dfs.fabric.microsoft.com"

token_credential = DefaultAzureCredential()
service_client = DataLakeServiceClient(account_url, credential=token_credential)
file_system_client = service_client.get_file_system_client(WORKSPACE_NAME)
stream = file_system_client.get_file_client(DATA_PATH).download_file()
data = stream.readall()
with open("tmp.png", "wb") as f:
    f.write(data)

• I have created App registration in Azure portal named Eddie’s App 2.
• I have created Client secrets in Eddie’s App 2.
• I have setup environment variables AZURE_TENANT_ID, AZURE_CLIENT_ID, AZURE_CLIENT_SECRET.
• I have added Eddie’s App 2 into my workspace as viewer.

I have successfully downloaded with the code & environment many times, but a few minutes later, it failed, I got following message:

azure.core.exceptions.HttpResponseError: User is not authorized to perform current operation for workspace 'some-uuid-xxxxxxx-xxxxxx' and artifact 'some-uuid-ooooooo-oooooo'
ErrorCode:Forbidden

I didn’t change anything.

10:23:29 Success.
10:29:42 Success.
10:37:10 Fail.

Can someone help?
thx.