When embedding how to not show auth and welcome screens

I’m self-hosting penpot. Through my app UI, I show it as embedded through iframe. But users see the authentication and welcome screens. I’d like to login those users into penpot automatically and show them dashboard as the first screen. What are my options?

My current thinking is that I could spin up proxy server to perform login and handle other stuff, and send to frontend only the dashhboard page. But maybe there’s a better already tested solution?

thanks for help!