how to block app access without login

is there a way to prevent users to access any url " except login and sign up "
as we can use App\Config\Filters.php as below (per my CI 4 course video till this question), it is a specific url to block and i can mention here in array multiples entries to block but is there a way to block all except above mentioned easy way (do not want to enter all one by one in the below list - if possible).
may be, my questions irritate but as metnioned i am very new to CI and my previous experience is not for a real web application development like CodeIgniter, so please, pardon me.

Code:

public $filters = [
        'login' => ['before' => ['/tasks(/*)?']]
    ];

regards