I've got a Tapo P100 setup in my garage connected to a battery charge for tools. I can turn the plug on and off via the Alexa which is great but sometimes I forget to switch it off and I don't really want to leave it running. 

I've created a shortcut in the Tapo app to turn the plug on and then switch off for an hour later but I can't get the Alexa to run this shortcut it just says it doesn't know how to help. Any ideas of what I need to do or is there a special commend I need to give Alexa to run shortcuts?

Thanks