Drupal 8 - User Login I am using Drupal 8 and want to know how I make my wesbite only usable when a user login. At the moment my websites features also used when a user has not logged in.
Go to Admin -> People -> Permissions, and uncheck any permissions for anonymous users. 

Go to Admin -> Configure -> People -> Account settings, and under 'Who can register accounts?', choose 'Administrators only'.