Seattle Behind Authelia with REMOTE_USER

I use the excellent Authelia for SSO. It sets the REMOTE_USER header which I know Seafile respects but there is an extra step. I use Traefik to forward auth headers so when a user visits seafile.example .com before logging in they are redirected to login.example .com and after successful login they are redirected back to seafile.example .com however Seafile doesnt seem to check for the header and the user is redirected to the Seafile login. From the login page if they click “Single Sign On” they are suddenly logged in and redirected to the full app.

Is there any way to skip the extra step and get Seafile to check for the header?

Thanks

I know this is now 2 years away - but did you manage to find a solution?