Power BI - PowerApps integration

[Selwynster]

Hi

I would like to add an action (In this case its a powerflow call to execute a Stored Proc), but I am not sure where to place my logic within PowerApps. 
It works fine when i add it to my OnVisible Property of the load Screen, but if a user selects a different option on the Slicer from the Power BI side, it will obvioulsy not run.

Sounds like it should be fairly simple but i am stuck.

Please help