url
path('user/<str:username>/', UserView.as_view(), name='user'),

model


class Profile(models.Model):
    user = models.OneToOneField(User, on_delete=models.CASCADE)
    image = models.ImageField(default='default.jpeg', upload_to='image')

view
class UserView(TemplateView):
    model = Profile
    template_name = 'signup/user.html'
    def get_queryset(self):
        user = get_object_or_404(User, username=self.kwargs.get('username'))
        return Profile.objects.filter(user=user)