Make session permanent (90 days, actually)

app.py

@@ -73,6 +73,8 @@ def confirm():
     if not bod:
         return render_template("wrong_key.html")
     session["user"] = { "id": bod.id, "email": bod.email}
+    session.permanent = True
+    app.permanent_session_lifetime = datetime.timedelta(days=90)
     return redirect(request.args["target"])
 
 @app.route("/vote/<string:key>")