[Munch]

Wrong forum
You want https://forums.alliedmods.net/showthread.php?p=856398
or https://forums.alliedmods.net/showthread.php?p=1000098
There may be others

Best used with this plugin https://forums.alliedmods.net/showthread.php?p=523211

Use a Keybind
bind "u" "say !usepoints" this is preferred to bind "u" "sm_usepoints" as it echos the command to the chat window letting other players know of its use.