Allow users to subscribe to mailing lists through the REST API.

* ISubscriptionService.join(): address -> subscriber.  This is not backward
  compatible with the previous API!
* Add get_user_by_id() to the IUserManager interface.  It was already
  implemented, but the interface was missing the definition.
* MissingUserError: new exception, purely for the REST API.

1 files changed, 2 insertions, 2 deletions

diff --git a/src/mailman/rest/members.py b/src/mailman/rest/members.py
index 1f6f1a913..06d917d11 100644
--- a/src/mailman/rest/members.py
+++ b/src/mailman/rest/members.py
@@ -102,10 +102,10 @@ class AllMembers(_MemberBase):
         service = getUtility(ISubscriptionService)
         try:
             validator = Validator(fqdn_listname=unicode,
-                                  address=unicode,
+                                  subscriber=unicode,
                                   real_name=unicode,
                                   delivery_mode=enum_validator(DeliveryMode),
-                                  _optional=('real_name', 'delivery_mode'))
+                                  _optional=('delivery_mode', 'real_name'))
             member = service.join(**validator(request))
         except AlreadySubscribedError:
             return http.conflict([], b'Member already subscribed')