laravel after signup giving error in builder.php

I am beginner in laravel. I just created a new laravel 5.4 project. Then I run

php artisan make:auth

After that I try to register the user. Now I am getting this error:

ErrorException in Builder.php line 2443:
Call to undefined method Illuminate\Database\Query\Builder::getAuthIdentifierName() (View: D:\wamp\www\crud\resources\views\welcome.blade.php)

It looks to me as error is coming from welcome.blade.php

@if (Route::has('login'))
    <div class="top-right links">
        @if (Auth::check())
            <a href="">Home</a>
        @else
            <a href="">Login</a>
            <a href="">Register</a>
        @endif
    </div>
@endif

Can anybody help me solve my problem. Thank you in advance.

via Chebli Mohamed