     suzinvite VARCHAR(32), -- Be sure the URLs fit in Tweets.  pol.is/<xinvite>
     UNIQUE (suzinvite)
 );
+CREATE INDEX suzinvites_owner_zid_idx ON suzinvites USING btree (owner, zid);
 
 
 --CREATE TABLE permissions(

    created BIGINT DEFAULT now_as_millis(),
    UNIQUE (owner, xid)
);

-- Single Use Invites
-- These records should contain enough to populate a record in the xids table (in conjunction with creating a user, which provides a uid)

    UNIQUE (email),
    UNIQUE (uid)
);
CREATE INDEX users_uid_idx ON users USING btree (uid);

-- this is the password hashes table.
-- the funny name is a bit of security by obscurity in case
