How to let hotspot Users check their own usage

Hey,

I’ve been looking for an answer and found some interesting topics but still no answer.

I’ve set up a hotspot, but I want my users to check their usage themselves.
I’ve limited their usage tot 50Gb / month.

The status page (opens when logging in) tells me what the usage is for this session, but doesn’t add up to the session of yesterday, and before that.

How can i let the users check their total usage of this month. (And how do i set the start and end of a month).
I’m pretty sure it must be possible to change the html page of the status but don’t know how…

I don’t want to let the users use the ‘usermanager’ addon.

Thanks in advance!