'DefaultAzureCredential' object has no attribute 'signed_session'

[msl0]

I'm trying to create a python script to interact with Azure DevOps and I have problem with authentication. I don't want to use PAT.
This works but I noticed it is recommended to use azure.identity instead of azure.common.credentials.get_azure_cli_credentials().

from azure.common.credentials import get_azure_cli_credentials
from azure.devops.connection import Connection

credential = get_azure_cli_credentials()[0]
connection = Connection(base_url="https://dev.azure.com/org_name", creds=credential)
core_client = connection.clients.get_core_client()
projects = core_client.get_projects()

When I try to use DefaultAzureCredential from azure.identity, I get following error:

'DefaultAzureCredential' object has no attribute 'signed_session'

from azure.identity import DefaultAzureCredential
from azure.devops.connection import Connection

credential = DefaultAzureCredential()
connection = Connection(base_url="https://dev.azure.com/org_name", creds=credential)
core_client = connection.clients.get_core_client()
projects = core_client.get_projects()

azure.identity = 1.12.0
azure.devops = 7.1.0b3
azure.common = 1.1.11

[jackmtpt]

https://github.com/Azure/azure-sdk-for-python/blob/main/sdk/identity/azure-identity/migration_guide.md looks like Microsoft need to update this module to support the azure-identity credentials; until then it won't work

Edit: Azure/azure-sdk-for-python#15330 (comment) this may be a workaround

[msl0]

I have prepared a working workaround using the msrest.authentication library. Unfortunately msrest is also deprecated, but it looks like Microsoft still uses it in their projects (az cli).

from azure.identity import DefaultAzureCredential
from msrest.authentication import BasicTokenAuthentication
from azure.devops.connection import Connection

credential = DefaultAzureCredential()
token = credential.get_token('499b84ac-1321-427f-aa17-267ca6975798/.default')
credentials = BasicTokenAuthentication({'access_token': token.token})
organization_url = 'https://dev.azure.com/myorg'
connection = Connection(base_url=organization_url, creds=credentials)

core_client = connection.clients.get_core_client()
get_projects_response = core_client.get_projects()
if get_projects_response:
    for project in get_projects_response:
        print(project.name)

[liorbp]

@msl0 workaround worked for me. thanks!