This feature is available only under a commercial or evaluation license.

The Contributions graphs show you a single commiter performance over the last year. Namely, the contributions are user commits and pull requests in all the repositories, as well as JIRA issues. , Unlike other Awesome Graphs stats, it's located right in the Stash user profile. So you'll need to enter a user's profile and click the Contributions tab. 

You'll see the user's calendar, it comprises all days over the last year starting from the current date. Days when any contribution were made are green. days without contributions are grey. You can hover a mouse over a day to see how many contributions were made on it.

Hold down the Shift key and click several squares to see stats for a day range.

 

Click a day for a detailed list of commits made on it, below you'll see JIRA issues fixed by these commits.