Authentification iframe grafana

Hello,

I’m looking for a tip to allow the “HA user” to access at the grafana graphs (via iframe). Currently, I have to enter my user & password if frequently or if I use a new PC/smartphone.
I tried with the API Keys or Direct link with the user and password in the url address but this solutions didn’t work.
I am with the docker solution, no Hassio. It’s the same thing for the Hassio’s users ?

Thank you.