private DecodedJWT jwt() {
        if (jwt == null) {
            // Decoding a token is expensive and involves construction of at least one Jackson ObjectMapper instance
            // TODO Cache encoder/decoder as static field in AthenzAccessToken
            jwt = JWT.decode(this.value);
        }
        return jwt;
    }
Represents an Athenz Access Token

@author bjorncs
vespa-athenz/src/main/java/com/yahoo/vespa/athenz/api/AthenzAccessToken.java