How to fix ML_Client can not connect to the workspace

Hi there,

I am trying to connect the ML workspace on my notebook.

Here's my code

# import required libraries
from azure.ai.ml import MLClient
from azure.ai.ml.entities import Environment, BuildContext
from azure.identity import DefaultAzureCredential


# Enter details of your AML workspace
subscription_id = ""
resource_group = ""
workspace = ""

# get a handle to the workspace
ml_client = MLClient(
    DefaultAzureCredential(), subscription_id, resource_group, workspace
)

Then I got the following errors

ClientAuthenticationError: DefaultAzureCredential failed to retrieve a token from the included credentials. Attempted credentials: EnvironmentCredential: EnvironmentCredential authentication unavailable. Environment variables are not fully configured. Visit 

Any suggestion?

Thanks&Regards,

zmsoft