There isn't an explicit option for that today, though there are a few workarounds that may be sufficient for your needs.
- We don't allow changing the password for AD/LDAP users, so if you have an AD/LDAP domain, you could create/use a shared user there.
- You could configure a separate Kibana instance and configure anonymous access. There are a few ways to do this, which I actually just outlined in a recent post I want authentication only for ES, not Kibana dashboards