-CREATE INDEX users_search_index ON users USING btree (uuid, owner_uuid, modified_by_client_uuid, modified_by_user_uuid, email, first_name, last_name, identity_url, default_owner_uuid);
+CREATE INDEX users_search_index ON users USING btree (uuid, owner_uuid, modified_by_client_uuid, modified_by_user_uuid, email, first_name, last_name, identity_url, default_owner_uuid, username);