Add created_{at,by}, updated_{at,by} to Profile model.

profile/models.py

@@ -28,6 +28,11 @@ class Profile(models.Model):
     )
     cba_username = models.CharField(_("CBA Username"), blank=True, max_length=60)
     cba_user_token = models.CharField(_("CBA Token"), blank=True, max_length=255)
+    # FIXME: these fields should be from an abstract model
+    created_at = models.DateTimeField(auto_now_add=True)
+    created_by = models.CharField(max_length=150)
+    updated_at = models.DateTimeField(auto_now=True)
+    updated_by = models.CharField(max_length=150)
 
     def __str__(self):
         return self.user.username