validation without validate method in laravel code example

Example 1: if any error in blade laravel

@if ($errors->any())
     @foreach ($errors->all() as $error)
         <div>{{$error}}</div>
     @endforeach
 @endif

Example 2: validate field for existing client laravel

unique:users,username,id,1 // table, field, idcolumn, value to ignore