The default for logging in via gar_shiny_ui, this creates no login page and just takes you straight to authentication on Shiny app load.
silent_auth(req)
What Shiny uses to check the URL parameters
Other pre-load shiny authentication: gar_shiny_auth_url
,
gar_shiny_auth
,
gar_shiny_login_ui
,
gar_shiny_ui