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diff --git a/src/mailman/rest/users.py b/src/mailman/rest/users.py
new file mode 100644
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+++ b/src/mailman/rest/users.py
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+# Copyright (C) 2011 by the Free Software Foundation, Inc.
+#
+# This file is part of GNU Mailman.
+#
+# GNU Mailman is free software: you can redistribute it and/or modify it under
+# the terms of the GNU General Public License as published by the Free
+# Software Foundation, either version 3 of the License, or (at your option)
+# any later version.
+#
+# GNU Mailman is distributed in the hope that it will be useful, but WITHOUT
+# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+# more details.
+#
+# You should have received a copy of the GNU General Public License along with
+# GNU Mailman.  If not, see <http://www.gnu.org/licenses/>.
+
+"""REST for users."""
+
+from __future__ import absolute_import, unicode_literals
+
+__metaclass__ = type
+__all__ = [
+    'AUser',
+    'AllUsers',
+    ]
+
+
+from restish import http, resource
+from zope.component import getUtility
+
+from mailman.interfaces.address import ExistingAddressError
+from mailman.interfaces.usermanager import IUserManager
+from mailman.rest.helpers import CollectionMixin, etag, path_to
+from mailman.rest.validator import Validator
+
+
+
+class _UserBase(resource.Resource, CollectionMixin):
+    """Shared base class for user representations."""
+
+    def _resource_as_dict(self, user):
+        """See `CollectionMixin`."""
+        # The canonical URL for a user is their preferred email address,
+        # although we can always look up a user based on any registered and
+        # validated email address associated with their account.
+        return dict(
+            real_name=user.real_name,
+            password=user.password,
+            user_id=user.user_id,
+            created_on=user.created_on,
+            )
+
+    def _get_collection(self, request):
+        """See `CollectionMixin`."""
+        return list(getUtility(IUserManager).users)
+
+
+
+class AllUsers(_UserBase):
+    """The users."""
+
+    @resource.GET()
+    def collection(self, request):
+        """/users"""
+        resource = self._make_collection(request)
+        return http.ok([], etag(resource))
+
+    @resource.POST()
+    def create(self, request):
+        """Create a new user."""
+        try:
+            validator = Validator(email=unicode,
+                                  real_name=unicode,
+                                  password=unicode,
+                                  _optional=('real_name', 'password'))
+            arguments = validator(request)
+        except ValueError as error:
+            return http.bad_request([], str(error))
+        # We can't pass the 'password' argument to the user creation method,
+        # so strip that out (if it exists), then create the user, adding the
+        # password after the fact if successful.
+        password = arguments.pop('password', None)
+        try:
+            user = getUtility(IUserManager).create_user(**arguments)
+        except ExistingAddressError as error:
+            return http.bad_request([], b'Address already exists {0}'.format(
+                error.email))
+        # XXX ignore password for now.
+        location = path_to('users/{0}'.format(user.user_id))
+        return http.created(location, [], None)
+
+
+
+class AUser(_UserBase):
+    """A user."""
+
+    def __init__(self, user_identifier):
+        """Get a user by various type of identifiers.
+
+        :param user_identifier: The identifier used to retrieve the user.  The
+            identifier may either be an integer user-id, or an email address
+            controlled by the user.  The type of identifier is auto-detected
+            by looking for an `@` symbol, in which case it's taken as an email
+            address, otherwise it's assumed to be an integer.
+        :type user_identifier: str
+        """
+        user_manager = getUtility(IUserManager)
+        if '@' in user_identifier:
+            self._user = user_manager.get_user(user_identifier)
+        else:
+            self._user = user_manager.get_user_by_id(user_identifier)
+
+    @resource.GET()
+    def user(self, request):
+        """Return a single user end-point."""
+        if self._user is None:
+            return http.not_found()
+        return http.ok([], self._resource_as_json(self._user))