FIX: fix login

Login should work again. Problem was in non-setting sessions. This was resolved by adding middleware "web" to admin group. Thanks to great documentation for NOT MENTIONING this pitfall!

app/Http/routes.php

@@ -3,14 +3,18 @@
 /**
  * This routing groups is used for routing along public part of website
  */
+use Illuminate\Http\Request;
+
 Route::group(['middleware' => ['web']], function () {
 
     // display login form
-    Route::get('login', 'Admin\Login@getLoginForm')
+    Route::get('login', function () {
+        return view('admin.loginForm.form');
+    })
          ->name('loginForm');
 
     // handle login
-    Route::post('admin/login', 'Admin\Login@postLogin')
+    Route::post('login', 'Admin\Login@postLogin')
          ->name('login');
 });
 
@@ -20,7 +24,7 @@ Route::group(['middleware' => ['web']], function () {
  * This route group serves to handle request in admin
  */
 Route::group([
-                 'middleware' => ['auth'],
+                 'middleware' => ['web', 'auth'],
                  'namespace'  => 'Admin',
                  'prefix'     => 'admin'
              ], function () {