sisvietnamvn_01/appointment/CachedToken.java

package vn.sis.appointment;

import java.time.Instant;

record CachedToken(String accessToken, String tokenType, Instant expiresAt) {
    boolean isValid() {
        return accessToken != null && !accessToken.isBlank()
                && Instant.now().isBefore(expiresAt.minusSeconds(15));
    }
}