System Activity - Min (Dashboard Created ) and Max (Dashboard Last Query Date)

[sunnygudVZ]

We are in the process of creating some Looker System Activity Dashboard metrics, unfortunately Looker doesnt expose the Model to create custom dimensions / groups. 

We are in the process of identifying the Min (Created Date) & Max(Last Query Date) for each Dashboard as shown here, any suggestion is really appreciated.

 

Min(Created Date) , Max(Updated Date)