def sign_up(request):
    context = {}
    form = UserCreationForm(request.POST or None)
    form.fields['username'].required = False
    if request.method == "POST":
        if form.is_valid():
            form.save()
            return render(request, 'accounts/index.html')

    context['form'] = form
    return render(request,'registration/sign_up.html', context)