[FEATURE REQ] Azure.Identity - Support KnownAuthorities like Python SDK

[jongio]

Azure.Identity

It would be great if we provided a "KnownAuthorities" concept, like we have in the Python SDK.
https://github.com/Azure/azure-sdk-for-python/blob/master/sdk/identity/azure-identity/azure/identity/_constants.py

Right now, in JS, devs have to provide the url for the environment they are targeting https://login.microsoftonline.us for Gov, for example.

With Python

credential = DefaultAzureCredential(authority=KnownAuthorities.AZURE_GOVERNMENT)

With JS

const credential = new DefaultAzureCredential({ authorityHost: "https://login.microsoftonline.us" });

[xirzec]

/cc @jonathandturner

[jongio]

@jonathandturner - Can we try to get this in April? We have .net and python done.

[jongio]

While Python uses the name KnownAuthorities, KnownAuthorityHosts looks like the better name for the other languages.

[sophiajt]

Yes, we should be able to. Should I grab the list of known authorities from the python version?

[jongio]

Yep. Thanks 🙏

[sophiajt]

Current PR: #7829

[jongio]

#7829 Merged into master, so closing this issue.