Anyway, this doesn't serve my original purpose as I do not have users -- I am the only user as the administrator, and I need logging of all costings for all requests through my project key. At the moment the only workaround is to download csvs manually for every page of the requests.
Hey. So I wanted to duplicate the “Export” csv available from the Requests panel. It only works one page at a time, but I want to be able export my entire history. It looks as though I can almost replicate this with the REST API, but it does not expose the cost, which is the most important parameter for me.