[Feature] Add support for GCC and other clouds

[beth-panx]

Proposal: Add support for GCC and other clouds

Description

Research on work needed.
Add support for cloud specific AAD login
Get token for cloud specific resource
Modify provider and graph client to support graph calls based on cloud specific urls

Rationale

Support broader customer base

Preferred Solution

Related to #878
Open to discussion

[ghost]

Hello beth-panx, thank you for opening an issue with us!

I have automatically added a "needs triage" label to help get things started. Our team will analyze and investigate the issue, and escalate it to the relevant team if possible. Other community members may also look into the issue and provide feedback 🙌

[adrian-gonzalez]

Hello - Wanted to check in and see if there has been progress on this feature.

I wrestled with this feature for some time until I realized that there was no support for Sovereign Clouds. Is there any particular guidance to replicate the functionality from some of the components in the kit? In particular the people-picker which was a perfect solve to the customer's use case.

[spjeff]

Do we know which code needs updating?

Graph URL from "graph.microsoft.com" to "graph.microsoft.us" is one change.

Are other changes needed with ACS authentication and OAuth Bearer token? Thank you.

[gavinbarron]

Closed with PR #1928