OS Dashboards - Iframe dashboard - guest account

I’m trying to iframe OpenSearch Dashboards.
With elasticsearch i can create a guest account that doesn’t require login into kibana and therefore the dashboard would load on the browser without asking to log in…

how do i achieve the same thing with opensearch? i am always redirected to OS login page unless i logged in in a separate tab, and that’s obviously not what i want

i’m trying to accomplish this Authentication in Kibana | Kibana Guide [8.4] | Elastic