Github Issues API

I am currently building a Github Issues clone and I use Github Issues API to fetch the data. The returned values can be retrieved based on state but I can't seem to find the data for total count of issues in a repo. Only 'open_issues' and 'open_issues_count' are being retrieved, no total count and count for closed issues. I wanted to use this total count information for pagination. If anyone has an idea, it would be a great help. Thank you.