support querying for secret with username

README.md

@@ -115,13 +115,14 @@ Data
 ```
 {
     "deviceName": "",
-    "deviceCategory": ""
+    "deviceCategory": "",
+    "userName": ""
 }
 ```
 
 Must be logged in to execute this command. Only secrets registered with the current user's RoleId can be retrieved.
 
-Either deviceName or deviceCategory can be specified (or both). Wildcards are supported for both deviceName and deviceCategory fields.
+Either deviceName or deviceCategory can be specified (or both). Wildcards are supported for both deviceName and deviceCategory fields. userName can also be specified in conjunction with deviceName or deviceCategory.
 1. The percent sign % wildcard matches any sequence of zero or more characters.
 2. The underscore _ wildcard matches any single character.