[feature-request]: Assert changes in authentication context mint different session ids

[jmelberg-okta]

Description

For middleware libraries that handle a user's session, we should assert that changing the authentication context will mint different session cookie IDs. For example:

1. User X authenticates into an application and is minted a session cookie

   Example: Cookie: connect.sid=s%3Az...

2. User X logs out of the application
3. User Y authenticates into an application and is minted a session cookie

   Example: Cookie: connect.sid=s%G9a...