docs: jwks_uri addition to OAUTH provider

[kravi21]

jwks_uri token is needed by the OAUTH to fetch the key and create token needed to connect to sso provider.
This will enable the OAUTH to verify the request and process it further.
If this is missing , then sso request was failing to connect to the OPENID type SSO request and will give following error
[Error] authorizing OAuth access token: Missing "jwks_uri" in metadata

Reference: https://stackoverflow.com/questions/72035617/runtimeerror-missing-jwks-uri-in-metadata-for-flask-and-azure-ad-authlib

[kravi21]

@rusackas @justinpark @mistercrunch @villebro @geido @eschutho @betodealmeida @nytai @craig-rueda @kgabryje @dpgaspar @kasiazjc @john-bodley
Please review.

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[sfirke]

hi @kravi21 thanks for this! Here's what I'm thinking:

• Superset uses Flask AppBuilder (FAB) for authentication.
• I'd rather have a single set of docs to update. I think that should be in FAB.
• Right now FAB docs list lots of off-the-shelf options like Azure, Google, but they aren't clear about how to create a new one that isn't listed. Which I think will sometimes need jwks_uri like you are adding here, but won't always?

If you can change your comment on that line to be # may be required to generate token I think we could merge this.

And then the proper fix I believe would be to improve the FAB docs to show how you create a new OAuth provider setup. Can you say what OAuth provider you are using? Maybe we could use that as an example.

[kravi21]

@sfirke I have updated the comment as suggested by you, Please review