--- /usr/ports/UIDs     2017-12-19 00:57:06.000000000 +0100
+++ /usr/local/poudriere/ports/default/UIDs     2018-01-16 00:33:56.049675000 +0100
@@ -835,7 +835,7 @@
 # free: 886
 # free: 887
 vuls:*:888:888::0:0:VULnerability Scanner:/var/db/vuls:/usr/sbin/nologin
-# free: 889
+mattermost:*:889:889::0:0:Mattermost:/usr/local/www/mattermost:/usr/sbin/nologin
 # free: 890
 # free: 891
 # free: 892