登录/注册后，重新加载页面 -> POST 请求 -> CSRF 令牌丢失或不正确

我在 context_proccessors.py 中有两种注册和授权方法。这些方法可在网站的任何页面上使用，以便用户可以在任何页面上登录或注册

def login_view(request): # вьюшка авторизации

    if request.method == 'GET':
        form_log = LoginForm(request.POST or None)

        data = {
            'form_log' : form_log,
        }
        return data

    if request.method == 'POST':
        if request.POST.get('submit_type') == 'Войти':
            form_log = LoginForm(request.POST or None)
            if form_log.is_valid():
                username = form_log.cleaned_data['username']
                password = form_log.cleaned_data['password']
                user = authenticate(username=username, password=password)
                if user:
                    profile = login(request, user)
                    return {}
            data = {
                'form_log' : form_log,
            }
            return data
        return {}

def registration_view(request): # вьюшка регистрации

    if request.method == 'GET':
        form_reg = RegistrationForm(request.POST or None)

        context = {
            'form_reg' : form_reg,
        }
        return context

    if request.method == 'POST':
        if request.POST.get('submit_type') == 'Зарегистрироваться':
            form_reg = RegistrationForm(request.POST or None)
            if form_reg.is_valid():
                new_user = form_reg.save(commit=False)
                new_user.username = form_reg.cleaned_data['username']
                new_user.email = form_reg.cleaned_data['email']
                new_user.save()
                new_user.set_password(form_reg.cleaned_data['password'])
                new_user.save()
                Profile.objects.create(
                    user=new_user,
                )
                user = authenticate(username=form_reg.cleaned_data['username'],                                   
                                    password=form_reg.cleaned_data['password'])
                login(request, user)
                return {}
            context = {
                'form_reg' : form_reg,
            }
            return context
        return {}

授权或注册后，页面更新。如果再次刷新页面，会重复POST请求，会报错：

如何保证授权或注册成功后，通过更新POST页面，请求不重复？？？