Rest Catalog Support for a Separate OAuth Server URI #233
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Closes: #230
This PR introduces support for Separation of Roles in OAuth authorization when using the REST Catalog, by allowing the user to use a distinct Authorization Server to fetch the access token and use it against the REST Catalog. In this scenario, the responsibility of the REST Catalog lies in validating the access token, instead of taking their secrets and deducing their identity and authorization.
This will allow PyIceberg to re-authorize the client using the stored credentials against the appropriate auth server if AuthorizationExpiredError is detected (Refreshing access_token is out of scope of this PR)