fix user model

Django's ORM internally expects this to be a method, not a property
https://docs.djangoproject.com/en/3.0/ref/models/instances/#get-absolute-url

Making it a property causes django to throw
`TypeError: 'str' object is not callable`
when creating a link to a user object

Author: chris48s

project/users/models.py

@@ -10,6 +10,5 @@ class User(AbstractUser):
     # around the globe.
     name = CharField(_("Name of User"), blank=True, max_length=255)
 
-    @property
     def get_absolute_url(self):
         return reverse("users:detail", kwargs={"username": self.username})