Add sienna-oshea.json with owner details

domains/sienna-oshea.json

@@ -0,0 +1,9 @@
+{
+  "owner": {
+    "username": "osheasienna",
+    "email": "osheasienna@gmail.com"
+  },
+  "records": {
+    "URL": "https://github.com/osheasienna"
+  }
+}