docs: revise readme docs about nested params (#128)

Author: stainless-app[bot]

README.md

@@ -81,6 +81,27 @@ Nested request parameters are [TypedDicts](https://docs.python.org/3/library/typ
 
 Typed requests and responses provide autocomplete and documentation within your editor. If you would like to see type errors in VS Code to help catch bugs earlier, set `python.analysis.typeCheckingMode` to `basic`.
 
+## Nested params
+
+Nested parameters are dictionaries, typed using `TypedDict`, for example:
+
+```python
+from arcadepy import Arcade
+
+client = Arcade()
+
+authorization_response = client.auth.authorize(
+    auth_requirement={
+        "id": "id",
+        "oauth2": {"scopes": ["string"]},
+        "provider_id": "provider_id",
+        "provider_type": "provider_type",
+    },
+    user_id="user_id",
+)
+print(authorization_response.auth_requirement)
+```
+
 ## Handling errors
 
 When the library is unable to connect to the API (for example, due to network connection problems or a timeout), a subclass of `arcadepy.APIConnectionError` is raised.