@Test
public void testSimpleIdentityDefaultV0() {

    
    SimpleServiceIdentityProvider provider = new SimpleServiceIdentityProvider("coretech",
            "athenz", Crypto.loadPrivateKey(k0File), "0");
    Principal user = provider.getIdentity("coretech", "athenz");
    assertNotNull(user);
    assertTrue(user.getIssueTime() != 0);
    
    String token = user.getCredentials();
    PrincipalToken prToken = new PrincipalToken(token);
    assertTrue(prToken.validate(servicePublicKeyStringK0, 0, false));
    assertEquals(prToken.getKeyId(), "0");
}