Laravel makes hard stuff really easy to do.
Imagine the case where you want to be able to login as a different user (a scenario which happens a lot during development). Instead of entering the credentials over and over again, you can do something like this:
if (app()->environment('local') { Auth::logout(); $user = User::find(1); // Or a different query to get the correct user Auth::login($user);}
Just be aware that this can be a security issue, hence the check to make this work only in the local environment.
Never, ever, allow stuff like this on production.