How to limit Hotspot free users?

Hello ,
I have a Free hotspot service in my office
to make it simple I created 1 user name :free
how can I limit the download of this user , for every user?
so everytime someone will connect with the user free - he will get 100 MB for download
and after it will get a massge that he has reach the limit

If I do this :

name="Free" password="Free" profile=default limit-bytes-in=10485760 limit-bytes-out=10485760 uptime=0s bytes-in=0 bytes-out=0 packets-in=0 packets-out=0

after rhe first user get to 10M , no one else can connect - I get massage “I have reach the limit” .
so how can I create 1 user that have limit for reach connection and not total limit ?

Thanks ,