3 files changed, 15 insertions, 0 deletions
diff --git a/src/mailman/interfaces/address.py b/src/mailman/interfaces/address.py
index 391eae849..c051c9b0c 100644
--- a/src/mailman/interfaces/address.py
+++ b/src/mailman/interfaces/address.py
@@ -40,6 +40,12 @@ from mailman.interfaces.errors import MailmanError
 class AddressError(MailmanError):
     """A general address-related error occurred."""
 
+    def __init__(self, address):
+        self.address = address
+
+    def __str__(self):
+        return self.address
+
 
 class ExistingAddressError(AddressError):
     """The given email address already exists."""
diff --git a/src/mailman/interfaces/member.py b/src/mailman/interfaces/member.py
index d20580498..a5e693411 100644
--- a/src/mailman/interfaces/member.py
+++ b/src/mailman/interfaces/member.py
@@ -127,6 +127,9 @@ class IMember(Interface):
     address = Attribute(
         """The email address that's subscribed to the list.""")
 
+    user = Attribute(
+        """The user associated with this member.""")
+
     preferences = Attribute(
         """This member's preferences.""")
 
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.""")