@section('navbar')

<header id="header">
    <div class="header_top">
        <div class="container">
            <div class="row">
                <div class="col-sm-3">
                    <div class="contactinfo">
                        <ul class="nav nav-pills">
                            <a href="{{ url('/') }}"><img style="size: 30" width="130px"
                                                          src="{{url('images/logo.png')}}"
                                                          alt=""/></a>

                        </ul>
                    </div>
                </div>
                <div class="col-sm-5">

                    <!--form-->
                    {!! Form::open(array('url' => 'busca/produto', 'method' => 'get', 'class'=>'form-horizontal')) !!}

                    <input type="text" class="form-search" name="busca_produto" value="" max-length="120"/>
                    <button id="submit" type="submit" class="btn btn-default"><span
                                class="glyphicon glyphicon-search"></span>&nbsp;
                    </button>
                    {!! Form::close() !!}

                <!--endform-->
                </div>
                <div class="col-sm-4 pull-right">
                    <div class="shop-menu pull-right">
                        <ul class="nav navbar-nav collapse navbar-collapse">
                            <li>
                                <a href="{{url('/compra/acompanhamento')}}"><i class="fa fa-shopping-cart"></i>
                                    Pedidos</a>
                            </li>
                            @if(Auth::check())
                                <li class="dropdown">
                                    <a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button"
                                       aria-expanded="false">
                                        {{ Auth::user()->usuario }} <span class="caret"></span>
                                    </a>

                                    <ul class="dropdown-menu" role="menu">
                                        <li><a href="{{ url('/home') }}"><i class="fa fa-btn fa-home"></i>Principal</a>
                                        </li>
                                        <li><a href="{{ url('/logout') }}"><i
                                                        class="fa fa-btn fa-sign-out"></i>Logout</a>
                                        </li>
                                    </ul>
                                </li>
                            @else
                                <li>
                                    <a href="{{ url('/home') }}">
                                        <i class="fa fa-user"></i> Login</a>
                                </li>
                                <li>
                                    <button class="btn btn-success-barra">
                                        <a href="{{ url('/register') }}"><font color="white">
                                                <i class="fa fa-plus"></i> Cadastrar-se</font>
                                        </a>
                                    </button>
                                </li>
                            @endif
                            <br><br>
                        </ul>
                    </div>
                </div>
            </div>
        </div>
    </div>


</header>

@endsection

was missing

public function __construct() { $this->middleware('auth:api'); }