Run CAS auth automatically

Hi folks,
I would like to know if there is a way to avoid to show to user the login view and to run automatically the CAS auth ? it’s to avoid that users have to click on CAS auth button uselessly.

With the CAS auth there is not need to use a token in the URL as it’s the CAS ticket which is the token and which is validated with all CAS redirections ! Is there something that would permit to connect users directly or we need to request a token from the Rocket.Chat API before all user auth ? Else how to do it ?