Mikrotik Newbie - Hotspot issues (IAS,Radius issues)

Please I need some help and Advice,

I have successfully Configured My Mikrotik box with:
Hotspot - Working fine
Hotspot Authenticating with Windows IAS - Working fine
Make changes to the default Hotspot login Page - ok

My Issue now is that I want to:
(1) keep logs and statistics of the hotspot users(authenticated thru IAS)
(2) let them change their passwords

But i don’t know how.
Thank you.