[Help] How to ban account permanently

[Frostivus]

Hi, i just added Ryusoft Guard into my source and it has a function of /ban "days" I can successfully banned accounts but when I adjust the date to a day for example april 24, 2017 make it to april 25, 2017 it can already login already when i type the command /ban xxxxx 50

/ban "ign" "days"

[MentaL]