Get access to roundcube only for authenticated users

I’m trying to add roundcube to my laravel website : below folder’s structure

public_html

  • app
  • public
  • resources
  • roundcube
    now the problem is : i want that only user logged in my website can access to roundcube cause now if i type mywebsite.com/roundcube i can access to it even if i’m not authenticated.
    Also i would like to autocomplete email field with session user’s email.
    Can someone help me? Thanks

For autocomplete email i’ve tried to access session variable, but this does not have effect