Add example for retrieving userinfo in a Flask app

source/documentation/apps/rshiny-app.md

@@ -229,6 +229,21 @@ profile <- fromJSON(content(GET("http://localhost:3001/userinfo", add_headers(.h
 [This line](https://github.com/moj-analytical-services/shiny-headers-demo/blob/c274d864e5ee020d3a41497b347b299c07305271/app.R#L61)
 shows the code in context.
 
+You can also access the userinfo in a similar manner from a python based application. You will need to access the raw cookie string and pass it as a header in the request to the `userinfo` endpoint.
+
+For example in a Flask application, where you have access to a `request` object, you can retreive the raw cookie string from the header as below:
+```python
+cookie = request.headers.get("Cookie")
+```
+
+You can then use the [`requests` library](https://requests.readthedocs.io/en/latest/) to call the `userinfo` endpoint, passing the cookie as a `"App-Cookie"` header as below:
+```python
+requests.get(
+    "http://localhost:3001/userinfo",
+    headers={"App-Cookie": cookie},
+)
+```
+
 ##### Example response
 
 ```json