为什么AuthenticationException异常捕获不到

postman请求返回结果

{
    "message": "Unauthenticated.",
    "status_code": 500,
    "debug": {
        "line": 82,
        "file": "/var/www/html/laravel-shop/vendor/laravel/framework/src/Illuminate/Auth/Middleware/Authenticate.php",
        "class": "Illuminate\\Auth\\AuthenticationException",
        "trace": [
            "#0 /var/www/html/laravel-shop/vendor/laravel/framework/src/Illuminate/Auth/Middleware/Authenticate.php(68): Illuminate\\Auth\\Middleware\\Authenticate->unauthenticated(Object(Dingo\\Api\\Http\\Request), Array)",
            "#1 /var/www/html/laravel-shop/vendor/laravel/framework/src/Illuminate/Auth/Middleware/Authenticate.php(42): Illuminate\\Auth\\Middleware\\Authenticate->authenticate(Object(Dingo\\Api\\Http\\Request), Array)",
            "#2 /var/www/html/laravel-shop/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(167): Illuminate\\Auth\\Middleware\\Authenticate->handle(Object(Dingo\\Api\\Http\\Request), Object(Closure), 'admin')",
            "#3 /var/www/html/laravel-shop/vendor/dingo/api/src/Http/Middleware/PrepareController.php(45): Illuminate\\Pipeline\\Pipeline->Illuminate\\Pipeline\\{closure}(Object(Dingo\\Api\\Http\\Request))",
            "#4 /var/www/html/laravel-shop/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(167): Dingo\\Api\\Http\\Middleware\\PrepareController->handle(Object(Dingo\\Api\\Http\\Request), Object(Closure))",
            "#5 /var/www/html/laravel-shop/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(103): Illuminate\\Pipeline\\Pipeline->Illuminate\\Pipeline\\{closure}(Object(Dingo\\Api\\Http\\Request))",
            "#6 /var/www/html/laravel-shop/vendor/laravel/framework/src/Illuminate/Routing/Router.php(687): Illuminate\\Pipeline\\Pipeline->then(Object(Closure))",
            "#7 /var/www/html/laravel-shop/vendor/laravel/framework/src/Illuminate/Routing/Router.php(662): Illuminate\\Routing\\Router->runRouteWithinStack(Object(Illuminate\\Routing\\Route), Object(Dingo\\Api\\Http\\Request))",
            "#8 /var/www/html/laravel-shop/vendor/laravel/framework/src/Illuminate/Routing/Router.php(628): Illuminate\\Routing\\Router->runRoute(Object(Dingo\\Api\\Http\\Request), Object(Illuminate\\Routing\\Route))",
            "#9 /var/www/html/laravel-shop/vendor/laravel/framework/src/Illuminate/Routing/Router.php(617): Illuminate\\Routing\\Router->dispatchToRoute(Object(Dingo\\Api\\Http\\Request))",
            "#10 /var/www/html/laravel-shop/vendor/dingo/api/src/Routing/Adapter/Laravel.php(88): Illuminate\\Routing\\Router->dispatch(Object(Dingo\\Api\\Http\\Request))",
            "#11 /var/www/html/laravel-shop/vendor/dingo/api/src/Routing/Router.php(518): Dingo\\Api\\Routing\\Adapter\\Laravel->dispatch(Object(Dingo\\Api\\Http\\Request), 'v1')",
            "#12 /var/www/html/laravel-shop/vendor/dingo/api/src/Http/Middleware/Request.php(126): Dingo\\Api\\Routing\\Router->dispatch(Object(Dingo\\Api\\Http\\Request))",
            "#13 /var/www/html/laravel-shop/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(128): Dingo\\Api\\Http\\Middleware\\Request->Dingo\\Api\\Http\\Middleware\\{closure}(Object(Dingo\\Api\\Http\\Request))",
            "#14 /var/www/html/laravel-shop/app/Http/Middleware/VerifySign.php(47): Illuminate\\Pipeline\\Pipeline->Illuminate\\Pipeline\\{closure}(Object(Dingo\\Api\\Http\\Request))",
            "#15 /var/www/html/laravel-shop/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(167): App\\Http\\Middleware\\VerifySign->handle(Object(Dingo\\Api\\Http\\Request), Object(Closure))",
            "#16 /var/www/html/laravel-shop/vendor/laravel/framework/src/Illuminate/Foundation/Http/Middleware/TransformsRequest.php(21): Illuminate\\Pipeline\\Pipeline->Illuminate\\Pipeline\\{closure}(Object(Dingo\\Api\\Http\\Request))",
            "#17 /var/www/html/laravel-shop/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(167): Illuminate\\Foundation\\Http\\Middleware\\TransformsRequest->handle(Object(Dingo\\Api\\Http\\Request), Object(Closure))",
            "#18 /var/www/html/laravel-shop/vendor/laravel/framework/src/Illuminate/Foundation/Http/Middleware/TransformsRequest.php(21): Illuminate\\Pipeline\\Pipeline->Illuminate\\Pipeline\\{closure}(Object(Dingo\\Api\\Http\\Request))",
            "#19 /var/www/html/laravel-shop/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(167): Illuminate\\Foundation\\Http\\Middleware\\TransformsRequest->handle(Object(Dingo\\Api\\Http\\Request), Object(Closure))",
            "#20 /var/www/html/laravel-shop/vendor/laravel/framework/src/Illuminate/Foundation/Http/Middleware/ValidatePostSize.php(27): Illuminate\\Pipeline\\Pipeline->Illuminate\\Pipeline\\{closure}(Object(Dingo\\Api\\Http\\Request))",
            "#21 /var/www/html/laravel-shop/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(167): Illuminate\\Foundation\\Http\\Middleware\\ValidatePostSize->handle(Object(Dingo\\Api\\Http\\Request), Object(Closure))",
            "#22 /var/www/html/laravel-shop/vendor/laravel/framework/src/Illuminate/Foundation/Http/Middleware/CheckForMaintenanceMode.php(63): Illuminate\\Pipeline\\Pipeline->Illuminate\\Pipeline\\{closure}(Object(Dingo\\Api\\Http\\Request))",
            "#23 /var/www/html/laravel-shop/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(167): Illuminate\\Foundation\\Http\\Middleware\\CheckForMaintenanceMode->handle(Object(Dingo\\Api\\Http\\Request), Object(Closure))",
            "#24 /var/www/html/laravel-shop/vendor/fruitcake/laravel-cors/src/HandleCors.php(57): Illuminate\\Pipeline\\Pipeline->Illuminate\\Pipeline\\{closure}(Object(Dingo\\Api\\Http\\Request))",
            "#25 /var/www/html/laravel-shop/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(167): Fruitcake\\Cors\\HandleCors->handle(Object(Dingo\\Api\\Http\\Request), Object(Closure))",
            "#26 /var/www/html/laravel-shop/vendor/fideloper/proxy/src/TrustProxies.php(57): Illuminate\\Pipeline\\Pipeline->Illuminate\\Pipeline\\{closure}(Object(Dingo\\Api\\Http\\Request))",
            "#27 /var/www/html/laravel-shop/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(167): Fideloper\\Proxy\\TrustProxies->handle(Object(Dingo\\Api\\Http\\Request), Object(Closure))",
            "#28 /var/www/html/laravel-shop/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(103): Illuminate\\Pipeline\\Pipeline->Illuminate\\Pipeline\\{closure}(Object(Dingo\\Api\\Http\\Request))",
            "#29 /var/www/html/laravel-shop/vendor/dingo/api/src/Http/Middleware/Request.php(127): Illuminate\\Pipeline\\Pipeline->then(Object(Closure))",
            "#30 /var/www/html/laravel-shop/vendor/dingo/api/src/Http/Middleware/Request.php(103): Dingo\\Api\\Http\\Middleware\\Request->sendRequestThroughRouter(Object(Dingo\\Api\\Http\\Request))",
            "#31 /var/www/html/laravel-shop/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(167): Dingo\\Api\\Http\\Middleware\\Request->handle(Object(Dingo\\Api\\Http\\Request), Object(Closure))",
            "#32 /var/www/html/laravel-shop/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(103): Illuminate\\Pipeline\\Pipeline->Illuminate\\Pipeline\\{closure}(Object(Illuminate\\Http\\Request))",
            "#33 /var/www/html/laravel-shop/vendor/laravel/framework/src/Illuminate/Foundation/Http/Kernel.php(140): Illuminate\\Pipeline\\Pipeline->then(Object(Closure))",
            "#34 /var/www/html/laravel-shop/vendor/laravel/framework/src/Illuminate/Foundation/Http/Kernel.php(109): Illuminate\\Foundation\\Http\\Kernel->sendRequestThroughRouter(Object(Illuminate\\Http\\Request))",
            "#35 /var/www/html/laravel-shop/public/index.php(55): Illuminate\\Foundation\\Http\\Kernel->handle(Object(Illuminate\\Http\\Request))",
            "#36 {main}"
        ]
    }
}

php代码：

        // token认证
        try{
            $this->middleware('auth:admin', ['except' => ['getToken','refresh','register']]);
        }catch (\Exception $e) {
            var_dump($e->getMessage());
        }