Guard Exception

gistfile1.php

ErrorException in Guard.php line 419:
Argument 1 passed to Illuminate\Auth\Guard::login() must be an instance of Illuminate\Contracts\Auth\Authenticatable, instance of Quiz\User given, called in D:\www\newquiz\app\AuthenticateUser.php on line 53 and defined

#Stace Trace
in Guard.php line 419
at HandleExceptions->handleError('4096', 'Argument 1 passed to Illuminate\Auth\Guard::login() must be an instance of Illuminate\Contracts\Auth\Authenticatable, instance of Quiz\User given, called in D:\www\newquiz\app\AuthenticateUser.php on line 53 and defined', 'D:\www\newquiz\vendor\laravel\framework\src\Illuminate\Auth\Guard.php', '419', array()) in Guard.php line 419
at Guard->login(object(User), true) in AuthenticateUser.php line 53
at AuthenticateUser->execute('facebook', true, object(AuthController)) in AuthController.php line 19
at AuthController->login('facebook', object(AuthenticateUser), object(Request))
at call_user_func_array(array(object(AuthController), 'login'), array('provider' => 'facebook', object(AuthenticateUser), object(Request))) in Controller.php line 245
at Controller->callAction('login', array('provider' => 'facebook', object(AuthenticateUser), object(Request))) in ControllerDispatcher.php line 162
at ControllerDispatcher->call(object(AuthController), object(Route), 'login') in ControllerDispatcher.php line 107
at ControllerDispatcher->Illuminate\Routing\{closure}(object(Request))
at call_user_func(object(Closure), object(Request)) in Pipeline.php line 141
at Pipeline->Illuminate\Pipeline\{closure}(object(Request))
at call_user_func(object(Closure), object(Request)) in Pipeline.php line 101
at Pipeline->then(object(Closure)) in ControllerDispatcher.php line 108
at ControllerDispatcher->callWithinStack(object(AuthController), object(Route), object(Request), 'login') in ControllerDispatcher.php line 67
at ControllerDispatcher->dispatch(object(Route), object(Request), 'Quiz\Http\Controllers\AuthController', 'login') in Route.php line 198
at Route->runWithCustomDispatcher(object(Request)) in Route.php line 131
at Route->run(object(Request)) in Router.php line 675
at Router->Illuminate\Routing\{closure}(object(Request))
at call_user_func(object(Closure), object(Request)) in Pipeline.php line 141
at Pipeline->Illuminate\Pipeline\{closure}(object(Request))
at call_user_func(object(Closure), object(Request)) in Pipeline.php line 101
at Pipeline->then(object(Closure)) in Router.php line 676
at Router->runRouteWithinStack(object(Route), object(Request)) in Router.php line 646
at Router->dispatchToRoute(object(Request)) in Router.php line 604
at Router->dispatch(object(Request)) in Kernel.php line 155
at Kernel->Illuminate\Foundation\Http\{closure}(object(Request))
at call_user_func(object(Closure), object(Request)) in Pipeline.php line 141
at Pipeline->Illuminate\Pipeline\{closure}(object(Request)) in VerifyCsrfToken.php line 43
at VerifyCsrfToken->handle(object(Request), object(Closure)) in Pipeline.php line 125
at Pipeline->Illuminate\Pipeline\{closure}(object(Request)) in ShareErrorsFromSession.php line 55
at ShareErrorsFromSession->handle(object(Request), object(Closure)) in Pipeline.php line 125
at Pipeline->Illuminate\Pipeline\{closure}(object(Request)) in StartSession.php line 53
at StartSession->handle(object(Request), object(Closure)) in Pipeline.php line 125
at Pipeline->Illuminate\Pipeline\{closure}(object(Request)) in AddQueuedCookiesToResponse.php line 36
at AddQueuedCookiesToResponse->handle(object(Request), object(Closure)) in Pipeline.php line 125
at Pipeline->Illuminate\Pipeline\{closure}(object(Request)) in EncryptCookies.php line 40
at EncryptCookies->handle(object(Request), object(Closure)) in Pipeline.php line 125
at Pipeline->Illuminate\Pipeline\{closure}(object(Request)) in CheckForMaintenanceMode.php line 42
at CheckForMaintenanceMode->handle(object(Request), object(Closure)) in Pipeline.php line 125
at Pipeline->Illuminate\Pipeline\{closure}(object(Request))
at call_user_func(object(Closure), object(Request)) in Pipeline.php line 101
at Pipeline->then(object(Closure)) in Kernel.php line 108
at Kernel->sendRequestThroughRouter(object(Request)) in Kernel.php line 83
at Kernel->handle(object(Request)) in index.php line 53