Summary: Provide the ability to audit and track user system activity.
As a System Administrator, I need to be able to access a date/time stamp record of every change that happened as a result of User interaction
Invitation being sent
As a System Administrator, I need to be able to filter the log by user.
Out of Scope
history of pages visited, time spent on each page
can be accomplished outside of the application through Google Analytics
requires Mailgun API to be complete