--- a/src/notes/models/auth.py	Tue Aug 01 12:20:14 2017 +0200
+++ b/src/notes/models/auth.py	Thu Aug 03 09:44:37 2017 +0200
@@ -40,6 +40,7 @@
     # indicate that this group is a personal group.
     # used this instead of a boolean because it allows to easily enforce that a user has only one personal group
     owner_personal = models.OneToOneField(User, on_delete=models.CASCADE, null=True, related_name='personal_group')
+    protocol = models.CharField(max_length=512, null=True, blank=True)
 
     @property
     def is_personal(self):