Rules.md

@@ -74,3 +74,14 @@ The create and update functions for the database entries in database_transaction
 **There should be no direct commits by db.session.commit().**
 
 Some times the db_model_object is created and just passed to the function. We might want to change this.
+
+### Working with the session cookie
+
+To avoid confusion with the database session, the session cookie from flask is importat as `login_session` and should be addressed like this
+
+~~~~
+from flask import session as login_session
+
+login_session.clear()
+login_session["user_id"] = fuser.id
+~~~~