Move to managed identity

[javier-alvarez]

https://docs.microsoft.com/en-us/azure/machine-learning/how-to-setup-authentication#use-managed-identity-authentication

from azureml.core.authentication import MsiAuthentication

msi_auth = MsiAuthentication()

ws = Workspace(subscription_id="your-sub-id",
resource_group="your-resource-group-id",
workspace_name="your-workspace-name",
auth=msi_auth
)