<?php

namespace RadDB\Http\Middleware;

use Illuminate\Auth\Middleware\Authenticate as Middleware;

class Authenticate extends Middleware
{
    /**
     * Get the path the user should be redirected to when they are not authenticated.
     *
     * @param  \Illuminate\Http\Request  $request
     * @return string
     */
    protected function redirectTo($request)
    {
        return route('login');
    }
}

<?php

namespace RadDB\Http\Middleware;

use Illuminate\Auth\Middleware\Authenticate as Middleware;

class Authenticate extends Middleware
{
    /**
     * Get the path the user should be redirected to when they are not authenticated.
     *
     * @param  \Illuminate\Http\Request  $request
     * @return string|null
     */
    protected function redirectTo($request)
    {
        return route('login');
    }
}

Update redirectTo return type PHPDoc
Update redirectTo return type PHPDoc

https://github.com/laravel/laravel/commit/40f93daa83b17ad47c51ec9beed4c1ba79eb66ed
