login.blade.php

 <div class="form-group row">
    <label for="name" class="col-sm-4 col-form-label text-md-right">{{ __('Usuario') }}</label>

    <div class="col-md-6">
        <input id="name" type="text" class="form-control{{ $errors->has('name') ? ' is-invalid' : '' }}" name="name" value="{{ old('name') }}" required autofocus>

        @if ($errors->has('name'))
            <span class="invalid-feedback">
                <strong>{{ $errors->first('name') }}</strong>
            </span>
        @endif
    </div>
</div>