Get the size of confluence space?

Quick question: Is there a way to get the size of the spaces in Confluence cloud? I was reviewing the cloud api and searching the community, but I’m not readily seeing a way to accomplish this goal.

I have an app in the marketplace and I have a client using it. While I have managed to extract the Last Modified and Friendly Dates, they were wondering if I could add a size column so they know which spaces are taking up storage space.

Thanks in advance!