generate a login

html
    <form class="form-signin" action="/entrar" method="post">
    <h1 class="h3 mb-3 font-weight-normal">Por favor, faça login.</h1>
    <label for="inputEmail" class="sr-only">Endereço de email</label>
    <input type="email" id="inputEmail" class="form-control" placeholder="Email address" required autofocus>
    <label for="inputPassword" class="sr-only">Palavra-passe</label>
    <input type="password" id="inputPassword" class="form-control" placeholder="Password" required>
    <div class="checkbox mb-3">
    <label>
    <input type="checkbox" value="remember-me"> Lembrar-me
    </label>
    </div>
    <button class="btn btn-lg btn-primary btn-block" type="submit">Entrar</button>
    </form>