Add laravel/ui package

Resolving issue:
In RouteRegistrar.php line 92:
Attribute [auth] does not exist.

composer.json

@@ -16,6 +16,7 @@
         "fideloper/proxy": "^4.0",
         "laravel/framework": "^7.0",
         "laravel/tinker": "^2.0",
+        "laravel/ui": "^2.0",
         "luthfi/formfield": "dev-laravel_7_support"
     },
     "require-dev": {

composer.lock

@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "1a269f43170487c91dad70cf1f8f00b6",
+    "content-hash": "b9414c56c74dfe94776dda88361836c7",
     "packages": [
         {
             "name": "backup-manager/backup-manager",
@@ -732,6 +732,61 @@
             "time": "2020-04-07T15:01:31+00:00"
         },
         {
+            "name": "laravel/ui",
+            "version": "v2.0.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/laravel/ui.git",
+                "reference": "47a0a1dac76f5e73803c86e1f38b2c7e0ae7fa83"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/laravel/ui/zipball/47a0a1dac76f5e73803c86e1f38b2c7e0ae7fa83",
+                "reference": "47a0a1dac76f5e73803c86e1f38b2c7e0ae7fa83",
+                "shasum": ""
+            },
+            "require": {
+                "illuminate/console": "^7.0",
+                "illuminate/filesystem": "^7.0",
+                "illuminate/support": "^7.0",
+                "php": "^7.2.5"
+            },
+            "require-dev": {
+                "mockery/mockery": "^1.0",
+                "phpunit/phpunit": "^8.0"
+            },
+            "type": "library",
+            "extra": {
+                "laravel": {
+                    "providers": [
+                        "Laravel\\Ui\\UiServiceProvider"
+                    ]
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Laravel\\Ui\\": "src/",
+                    "Illuminate\\Foundation\\Auth\\": "auth-backend/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Taylor Otwell",
+                    "email": "taylor@laravel.com"
+                }
+            ],
+            "description": "Laravel UI utilities and presets.",
+            "keywords": [
+                "laravel",
+                "ui"
+            ],
+            "time": "2020-03-03T20:16:46+00:00"
+        },
+        {
             "name": "laravelcollective/html",
             "version": "v6.1.0",
             "source": {