您定义的路线中的错误.它的get，应更改为post

Error in the route you've defined. Its get and should change to post

更改此

Route::get('/login', ['as' => 'login', 'uses' => 'LoginController@getLogin']);

对此

Route::post('/login', ['as' => 'login', 'uses' => 'LoginController@getLogin']);

action="{{ route('login') }}" # form Submit action