diff --git a/structure.yml b/structure.yml
index f7998cc..5b8f870 100644
--- a/structure.yml
+++ b/structure.yml
@@ -34,16 +34,22 @@ nginx:
     type: mail
 
   htpasswd_file:
-    description: htpassword file
+    description: htpassword user credential file name
     type: unix_filename
     default: /etc/nginx/.htpasswd
+    params:
+      types:
+        - file
 
   users:
+    description: nginx authenticated user credentials
     type: leadership
 
     username:
+      description: nginx user
       type: unix_user
 
     password:
+      description: nginx password
       type: secret
 ...