docs: protected int getAccessTokenValiditySeconds(OAuth2Request clientAuth) {
  		if (clientDetailsService != null) {
  			ClientDetails client = clientDetailsService.loadClientByClientId(clientAuth.getClientId());
  			Integer validity = client.getAccessTokenValiditySeconds();
  			if (validity != null) {
  				return validity;
  			}
  		}
  		return accessTokenValiditySeconds;
  	}