feat: add token introspection on sample /user/home endpoint and inject access_token into client cookie

templates/user_home.html

@@ -1,5 +1,13 @@
 {% extends "base.html" %}
 
 {% block content %}
-<h1> User Home</h1>
+{% if username != "" %}
+<h1>Hello <i>{{ username }}</i></h1>
+{% else %}
+<h1>User Home</h1>
+{% endif %}
+
+<p>Your user session is <b>{% if is_active %}active{% else %}inactive{% endif %}</b></p>
+
+<p>Request took <b>{{ duration.as_millis() }}</b>ms</p>
 {% endblock content %}