Prefix system to use for when going AFK. This system uses .afk to go AFK the bot won't change your name if you have the change name disabled, If you have it enabled it will add to the display name of the user AFK and wen he sends a message/comes back the message goes and his display name goes back to normal, You are able to leave a message while you are gone just after saying .afk put the reason after it and bot will save it and send it to members when they mention you in a channel.