One Click Login API in Cloudflare Host API

I recently got access to Cloudflare host api which allow me to create user’s account on Cloudflare and let them use Cloudflare service.

It would be really helpful if the API could provide an option for one click login into user’s Cloudflare account so they can access their Cloudflare account direclty from my portal in one click.

Thoughts on it?

When you create user account you get their User API key which you can use to directly operate on their account by utilizing API. Essentially you are able to cover anything by making your own front for API (in your portal).
I know that you would like to somehow have an ability to log in user to CF panel without need for user to enter e-mail/pass but that is (from my knowledge) currently not possible.