public String generate(long id) {
        Date expirationDate = new Date(System.currentTimeMillis() + jwtProperties.getExpirationPeriodInMillis());
        return JWT.create()
                .withClaim(CLAIM_ID, id)
                .withExpiresAt(expirationDate)
                .sign(Algorithm.HMAC256(jwtProperties.getSecretKey()));
    }
@DisplayName("참가자의 정보를 이용하여 jwt 토큰을 발행한다.")
    @Test
    void generate() {
        String token = jwtManager.generate(1L);

        long attendeeId = jwtManager.extract(token);

        assertThat(attendeeId).isEqualTo(1L);
    }