Ability to keep track of the user who closes a sprint

Summary

Earlier versions of JIRA Agile (before JIRA 6.4.0.3) Are unable to track the user who closed a sprint.

Steps to Reproduce

1. Close an Agile Sprint.
2. Attempt to locate who Closed the Sprint.

Expected Results

There should be some method to see who closed the Sprint.

Actual Results

Details of who closed the Sprint are never recorded.

Notes

In more recent versions of JIRA Agile (6.4.5+), you are able to determine who closed the Sprint by clicking the Reports button from the Agile board, and reviewing the details under the Sprint Report heading. Sprints closed with previous versions of JIRA Agile will not record a User within this information regardless of the current running version of JIRA Agile