@Override
        public String toString() {
            return MoreObjects.toStringHelper(this)
                              .omitNullValues()
                              .add("accessToken", accessToken)
                              .add("tokenTtl", TimeUnit.NANOSECONDS.toSeconds(tokenTtlNanos))
                              .add("globalAdmin", globalAdmin)
                              .toString();
        }
A Nacos client that is responsible for
<a href="https://nacos.io/en-us/docs/auth.html">Nacos Authentication</a>.
nacos/src/main/java/com/linecorp/armeria/internal/nacos/LoginClient.java