url
path('user/(?P<pk>\d+)/$/', UserView.as_view(), name='user'),

view
class UserView(DetailView):
    model = Profile
    template_name = 'signup/user.html'

model

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