diff --git a/machines/gerd/services/member-website/app.py b/machines/gerd/services/member-website/app.py
index a8cdb4d..70f02e7 100755
--- a/machines/gerd/services/member-website/app.py
+++ b/machines/gerd/services/member-website/app.py
@@ -38,6 +38,19 @@ tmpl_index = """
   </pre>
 <hr>
 {% endfor %}
+
+{% if show_debug %}
+<br>
+<br>
+<br>
+Debug information:
+<ul>
+  <li>Username: {{ user.username }}</li>
+  <li>Name: {{ user.name }}</li>
+  <li>Email: {{ user.email }}</li>
+  <li>Groups: {{ user.groups }}</li>
+</ul>
+{% endif %}
 """
 
 
@@ -90,6 +103,7 @@ def index():
         tmpl_index,
         services=services_data,
         user=user_info,
+        show_debug=bool(request.args.get("debug")),
     )
     return render_template_string(
         tmpl_firstpass,