apollo-portal/src/main/java/com/ctrip/framework/apollo/portal/spi/oidc/OidcAuthenticationSuccessEventListener.java/OidcAuthenticationSuccessEventListener/contains
class OidcAuthenticationSuccessEventListener:  private boolean contains(String userId) {
    if (this.userIdCache.containsKey(userId)) {
      return true;
    }
    UserInfo userInfo = this.oidcLocalUserService.findByUserId(userId);
    if (userInfo != null) {
      this.userIdCache.put(userId, userId);
      return true;
    }
    return false;
  }