Add private_get to ejabberd service

app/services/ejabberd_api_client.rb

@@ -22,8 +22,19 @@ class EjabberdApiClient
     post "send_message", payload
   end
 
+  def private_get(user, element_name, namespace)
+    payload = {
+      user: user.cn, host: user.ou,
+      element: element_name, ns: namespace
+    }
+    post "private_set", payload
+  end
+
   def private_set(user, content)
-    payload = { user: user.cn, host: user.ou, element: content }
+    payload = {
+      user: user.cn, host: user.ou,
+      element: content
+    }
     post "private_set", payload
   end
 end