public AuthService build(HttpService delegate) {
        return new AuthService(requireNonNull(delegate, "delegate"), authorizer(),
                               successHandler, failureHandler, meterIdPrefix);
    }
Returns a newly-created {@link AuthService} based on the {@link Authorizer}s added to this builder.
core/src/main/java/com/linecorp/armeria/server/auth/AuthServiceBuilder.java