How would I set size limits to buckets on minio?

Question

I'm using minio on a VPS to host an S3 server. I'm making a cloud storage website as a personal project. I want every user to have a set amount of space, each user would have their own bucket. I already have most of the stuff set up, all I need is for the user to get a warning if their upload is over the capacity limit and cancel the file transfer.