apollo-portal/src/main/java/com/ctrip/framework/apollo/portal/api/AdminServiceAPI.java/AdminServiceAPI/findByAppId
class AdminServiceAPI:    public List<AccessKeyDTO> findByAppId(Env env, String appId) {
      AccessKeyDTO[] accessKeys = restTemplate.get(env, "apps/{appId}/accesskeys",
          AccessKeyDTO[].class, appId);
      return Arrays.asList(accessKeys);
    }