1 files changed, 6 insertions, 0 deletions

diff --git a/src/mailman/interfaces/user.py b/src/mailman/interfaces/user.py
index 5e894701f..2c2652413 100644
--- a/src/mailman/interfaces/user.py
+++ b/src/mailman/interfaces/user.py
@@ -38,6 +38,12 @@ class IUser(Interface):
     password = Attribute(
         """This user's password information.""")
 
+    user_id = Attribute(
+        """The user's unique, random, identifier (sha1 hex digest).""")
+
+    created_on = Attribute(
+        """The date and time at which this user was created.""")
+
     addresses = Attribute(
         """An iterator over all the `IAddresses` controlled by this user.""")