build.gradle (:app) api 'io.jsonwebtoken:jjwt-api:0.11.2' runtimeOnly 'io.jsonwebtoken:jjwt-impl:0.11.2' runtimeOnly('io.jsonwebtoken:jjwt-orgjson:0.11.2') { exclude group: 'org.json', module: 'json'//provided by Android natively } create json web token // 12시간 val expiration = System.currentTimeMillis() + 12 * (60 * 60 * 1000) val base64EncodedSecretKey = "your_secretKey_abcdefghijklmn==" val b..