def register(request, template="register.html", redirect='/'):
    if request.method=="POST":
        form=   RegisterForm(request.POST)
        if form.is_valid():
            form.save()
            email=          form.cleaned_data.get("email")
            raw_password=   form.cleaned_data.get("password1")
            user=           authenticate(email=email, password=raw_password)
            login(request, user)
            return redirect('/')
    else:
        form=   RegisterForm()
    return render(request, template, {"form": form})

class RegisterForm(UserCreationForm):
    email=      forms.EmailField(label=_("Email"), max_length=254)

    class Meta:
        model=  User
        fields= ("email",)

{% extends "base.html" %}
{% block main %}
    <h2>Register</h2>
    <form method="post">
        {% csrf_token %}
        {{ form.as_p }}
        <button type="submit">Register</button>
    </form>
{% endblock main %}