diff --git a/foxyproxy/10-redefine.yml b/foxyproxy/10-redefine.yml
new file mode 100644
index 00000000..aef4325b
--- /dev/null
+++ b/foxyproxy/10-redefine.yml
@@ -0,0 +1,19 @@
+%YAML 1.2
+---
+version: 1.1
+
+proxies:
+
+  username:
+    redefine: true
+    mandatory: false
+
+  password:
+    redefine: true
+    hidden:
+      jinja: |-
+        {% if not _.username %}
+          no username defined
+        {% endif %}
+      description: if username is not defined
+...