Identity lookup implementation for REST backend

src/main/groovy/io/kamax/mxisd/util/RestClientUtils.java

@@ -41,4 +41,8 @@ public class RestClientUtils {
         return post(url, JsonUtils.getObjAsString(gson, member, o));
     }
 
+    public static HttpPost post(String url, Gson gson, Object o) {
+        return post(url, gson.toJson(o));
+    }
+
 }