Django: creating form which has relationship

I've prepared a model with a relationship.
I'd like to get a form which will make it possible to create User for that form.

Could someone explain me how it can be resolved?

class UserProfile(models.Model):
     user = models.OneToOneField(User, unique=True, primary_key=True)
     website = models.URLField(null=True, blank=True)
     accepted_rules = models.BooleanField(default=False)
     accepted_rules_date = models.DateTimeField(auto_now_add=True)
 
 
 class UserProfile(ModelForm):
     class Meta:
         model = UserProfile
 
 @csrf_protect
 def register(request):
     if request.method == "POST":
 
         form = UserProfile(request.POST or None)
         if form.is_valid():
             website = form.cleaned_data['website']
             accepted_rules = form.cleaned_data['accepted_rules']
 
             username = form.cleaned_data['username']
             email = form.cleaned_data['email']
             password = form.cleaned_data['password']
 
 
 
             formset.save()
 
 
             print "All Correct"            
 
 
     return TemplateResponse(request, 'base.html', {
                              'form':form,
                              }
                             )
 

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