apollo-portal/src/main/java/com/ctrip/framework/apollo/portal/api/AdminServiceAPI.java/AccessKeyAPI/enable
class AccessKeyAPI:    public void enable(Env env, String appId, long id, String operator) {
      restTemplate.put(env, "apps/{appId}/accesskeys/{id}/enable?operator={operator}",
          null, appId, id, operator);
    }