presto-proxy/src/main/java/io/prestosql/proxy/JsonWebTokenHandler.java/JsonWebTokenHandler/JsonWebTokenHandler
class JsonWebTokenHandler:    @Inject
    public JsonWebTokenHandler(JwtHandlerConfig config)
    {
        this.jwtSigner = setupJwtSigner(config.getJwtKeyFile(), config.getJwtKeyFilePassword());
        this.jwtKeyId = Optional.ofNullable(config.getJwtKeyId());
        this.jwtIssuer = Optional.ofNullable(config.getJwtIssuer());
        this.jwtAudience = Optional.ofNullable(config.getJwtAudience());
    }