Laravel 5.4 auth::check() false - php

Question

I want to make my index page with both guest and auth functions.
When guests visit, they could try logging in; And after login, it will show the user's info such as username.
Route routes/web.php:
Route::get('vendor', function () {
return view('vendor.home');
})->name('vendor')->middleware('web');
in blade template i use Auth::check() to authentication but failed.if i use middleware(['web','auth:vendor']) if guest will redirect to login page
#if(Auth::guest())
<li> <strong><i class="fa fa-user"></i> Login </strong> </li>
<li> <strong>Register</strong> </li>
#else
<li class="dropdown">
<a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-expanded="false">
{{ Auth::user()->name }} <span class="caret"></span>
</a>
<ul class="dropdown-menu" role="menu">
<li>
Log Out
</li>
</ul>
</li>
#endif
{{ dd(Auth::check()) }}
Every time I logged in successfully, it will still show login button instead of user name button, after I REFRESH the index page.
this result

Answer 1

try replace Auth:: with \Auth:: or auth()
#if(\Auth::guest())
<li> <strong><i class="fa fa-user"></i> Login </strong> </li>
<li> <strong>Register</strong> </li>
#else
<li class="dropdown">
<a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-expanded="false">
{{ \Auth::user()->name }} <span class="caret"></span>
</a>
<ul class="dropdown-menu" role="menu">
<li>
Log Out
</li>
</ul>
</li>
#endif
{{ dd(\Auth::user()) }}

Answer 2

This my answer
#if(Auth::guard('vendor')->check())
<li class="dropdown">
<a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-expanded="false">
{{ Auth::guard('vendor')->user()->name }} <span class="caret"></span>
</a>
<ul class="dropdown-menu" role="menu">
<li>
Dashboard
</li>
<li>
<a href="{{ route('vendor.logout') }}" >Log Out</a>
</li>
</ul>
</li>
#else
<li> <strong><i class="fa fa-lock"></i> Login </strong> </li>
<li> <strong>Register</strong> </li>
#endif