Where does the iframe takes the user informations from?

Hey,

I am trying to set up the iframe, for three days now. I am unsure why this is so hard. I am probably just striped. I don’t know.

it is working if I return a hardcoded login token back. I cannot fetch any user information, because I am not getting anything from the frontend. From where does the iframe take the information for the request to the AuthRoute?