if (credentialsObj instanceof JSONArray) {
                JSONArray credentialsObjArray = (JSONArray) credentialsObj;
                credentials = req.bindJSONToList(CredentialsModel.class, credentialsObjArray);
            } else if (credentialsObj instanceof JSONObject) {
                CredentialsModel credentialsModel = req.bindJSON(CredentialsModel.class, (JSONObject) credentialsObj);