"sequence item 0: expected str instance, list found" error when making call from national cloud deployments

[puchy22]

Describe the bug

I am following this tutorial to make petitions against a US Gov L4; but I am getting this error with every call:
sequence item 0: expected str instance, list found

Expected behavior

Connect to US Gov L4 and make calls like with Global Service.

How to reproduce

Follow this example: https://learn.microsoft.com/en-us/graph/sdks/national-clouds?tabs=python#examples

SDK Version

1.18.0

Latest version known to work for scenario above?

No response

Known Workarounds

No response

Debug output

Click to expand log

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</details>


### Configuration

- OS: MacOs 15.3
- architecture: ARM

### Other information

_No response_

[musale]

@puchy22 I see the issue with that tutorial, When using InteractiveBrowserCredential with the Microsoft Graph SDK, the scopes parameter should be a list of strings, not a nested list. Here's the corrected code:

from azure.identity import InteractiveBrowserCredential
from msgraph import GraphServiceClient
from msgraph.core import NationalClouds
from kiota_authentication_azure.azure_identity_authentication_provider import AzureIdentityAuthenticationProvider
from msgraph._generated.graph_request_adapter import GraphRequestAdapter
from msgraph.core.graph_client_factory import GraphClientFactory

# Define scopes as a flat list of strings
scopes = 'https://graph.microsoft.us/.default'  # Single scope as string

credential = InteractiveBrowserCredential(
    tenant_id='YOUR_TENANT_ID',
    client_id='YOUR_CLIENT_ID',
    redirect_uri='YOUR_REDIRECT_URI')

# Create auth provider with the string scope
auth_provider = AzureIdentityAuthenticationProvider(credential, scopes=scopes)

# Create the HTTP client using
# the Microsoft Graph for US Government L4 endpoint
http_client = GraphClientFactory.create_with_default_middleware(
    host=NationalClouds.US_GOV)

adapter = GraphRequestAdapter(auth_provider, http_client)

graph_client = GraphServiceClient(request_adapter=adapter)

The key change is in the scopes definition. Instead of using a list containing a string, we're passing the scope string directly. The AzureIdentityAuthenticationProvider will handle converting it to the appropriate format internally.

If you need multiple scopes, you can pass them as a space-separated string:

scopes = 'https://graph.microsoft.us/.default User.Read Mail.Read'

[microsoft-github-policy-service]

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