RegisterController

<?php

namespace App\Http\Controllers\Auth;

use App\City;
use App\Http\Controllers\Controller;
use App\Providers\RouteServiceProvider;
use App\University;
use App\User;
use Illuminate\Foundation\Auth\RegistersUsers;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Hash;
use Illuminate\Support\Facades\Redirect;
use Illuminate\Support\Facades\Validator;


class RegisterController extends Controller
{

    use RegistersUsers;

    /**
     * Where to redirect users after registration.
     *
     * @var string
     */
    protected $redirectTo = RouteServiceProvider::INDEX;

    /**
     * Create a new controller instance.
     *
     * @return void
     */
    public function __construct()
    {
        $this->middleware('guest');
    }


    protected function validator(array $data){

        $validator = Validator::make($data, [
            'name' => ['required', 'string', 'max:50','min:3'],
            'email' => ['required','email', 'unique:users'],
            'password' => ['required', 'min:8', 'confirmed'],
            'uni' => ['required'],
            'city' => ['required'],
        ],[
            'required' => 'هذا الحقل مطلوب',
            'email'=>'نمط البريد الالكتروني غير صحيح',
            'min'=>'يجب إدخال 8 حروف عالأقل',
            'email.unique' => 'هذا البريد الالكتروني مستخدم',
            'confirmed'=>'الرجاء التأكد من كلمة المرور',
            'max'=>'50 حرف هو أقصى حد يمكن إدخاله',
            'name.min'=>'الاسم قصير جدا',

        ]);
    }
    protected function create(array $data){
        if ($this->validator($data)->fails()) {
            return Redirect::back()->withErrors($this->validator($data))
                ->withInput();
        }
        return User::create([
            'name' => $data['name'],
            'email' => $data['email'],
            'password' => Hash::make($data['password']),
            'photo'=>'img/user.jfif',
            'university'=>$data['uni'],
            'city'=>$data['city'],
        ]);
    }
    public function showRegistrationForm()
    {
        $universities=University::all();
        $cities=City::all();
        return view('auth.register',['universities'=>$universities,'cities'=>$cities]);
    }
}