Bring auth-exception-bubbling fix to master
Bring auth-exception-bubbling fix to master

I'm concerned that this try-catch that got removed on develop (6f7ccb7d0c28da416831fcaac27e0a4e5d242bee) is impeding debugging issues people are having on master as well, because Auth exceptions show up through the middleware there as `user_not_found`. This could be the root cause of #393 & #397 for example.
johnturingan/laravel-jwt-auth,u-paid/laravel_jwt_auth