Формы inline

<div class="form">
    <form method="post">
        <input type="hidden" name="token" value="{{ $_SESSION['token'] }}">
        <div class="form-inline">
            <div class="form-group{{ hasError('user') }}">
                <input type="text" class="form-control" id="user" name="user" maxlength="20" value="{{ getInput('user') }}" placeholder="Логин пользователя" required>
            </div>

            <button class="btn btn-primary">Добавить</button>
        </div>
        <div class="invalid-feedback">{{ textError('user') }}</div>
    </form>
</div>