[oauth] group mapping parsing error from entra

[sks]

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• I have searched the issue tracker for an issue that matches the one I want to file, without success.
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Version

v2.44.0

Storage Type

Postgres

Installation Type

Official Helm chart

Expected Behavior

When connecting with Microsoft Entra using oauth mechanism, the groups must come as strings

Actual Behavior

Not sure why, but the entra is sending the group/role claims as JSON string in the userInfo response,

This causes the groups/role mapping as stringified json which is not usable

Steps To Reproduce

1. Create the application in entra
2. configure dex to use the entra

Additional Information

• I am using having the manifest entry

"additionalProperties": [
					"cloud_displayname",
					"emit_as_roles"
				]

Configuration

- type: oauth
    id: Entra
    name: Entra ID
    config:
      clientSecret: "CLIENT_SECRET"
      clientID: "CLIENT_ID"
      tokenURL: "https://login.microsoftonline.com/XXXXX/oauth2/token"
      authorizationURL: "https://login.microsoftonline.com/XXXXX/oauth2/authorize"
      userInfoURL: "https://login.microsoftonline.com/XXXXX/openid/userinfo"
      scopes: ["openid", "profile", "email"]
      redirectURI: "https://tunnel.usw3.devtunnels.ms/dex/callback"
      userIDKey: "oid"
      claimMapping: { "userNameKey" : "name","groupsKey": "roles" }

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