You must be registred on the website in order for me to track your stats. I don't want to collect everyone's stats without asking.
In addition, there is no way for me to retrieve your old stats because osu! probably doesn't keep track of it.
If there is ever a possibility to gather those informations that i couldn't get in the first place, i'll surely add them !
With the addition of oauth2 on osu!, the bot is no longer necessary !