I try this plugin in a Sven Co-op 5.0 Dedicated Server, and no working, the plugins is run, and the command in console:
vip_adduser "STEAM_0:1:13698540" "steamid" "" "abcdefghijklmnopqrstu" "30"
or
vip_adduser "STEAM_0:1:13698540" "steam" "" "abcdefghijklmnopqrstu" "30"
And work fine to add the admin in svencoop\addons\amxmodx\configs\vip_users.ini
(I no use SQL)
"steamid" "STEAM_0:1:13698540" "" "abcdefghijklmnopqrstu" "2016-09-28"
"steam" "STEAM_0:1:13698540" "" "abcdefghijklmnopqrstu" "2016-09-28"
But when I entered the server, I do not exist as a vip user, I can not use administrator access.