How to get minutes listened via Spotify Web API?

Question

I want to get the minutes listened for the signed in user.

There is no straight-forward way to do so mentioned in the docs.

Initially, I thought of getting user's top items and then calculating using each track's length and times played, but the response doesn't give the times played and the maximum number of items that can be obtained is limited to 50.

I'm pretty sure that this can be done because this website does it.

Thanks!