docs: Add claims parameter to config docs

Author: frereit

docs/docs/usage/config.md

@@ -33,6 +33,7 @@ See specific example [configurations for your provider](/docs/category/providers
 - **clientSecret** - (`string`) client secret to pass to token exchange requests. :warning: Read more about [client secrets](/docs/client-secrets)
 - **redirectUrl** - (`string`) _REQUIRED_ the url that links back to your app with the auth code. Depending on your [provider](/docs/category/providers), you may find that you need to add a trailing slash to your redirect URL.
 - **scopes** - (`array<string>`) the scopes for your token, e.g. `['email', 'offline_access']`.
+- **claims** - (`object`) the requested claims for your token, e.g. `  { "id_token": { "given_name": null } }`.
 - **additionalParameters** - (`object`) additional parameters that will be passed in the authorization request.
   Must be string values! E.g. setting `additionalParameters: { hello: 'world', foo: 'bar' }` would add
   `hello=world&foo=bar` to the authorization request.