Is there a GetGameList Cloud Script example?

I'm trying to get a game list to rejoin a previous game as explained in the Memory Game Demo but I only get a "No Cloud Script with ActionId GetGameList found" response. Apparently, the cloud script provided by PlayFab doesn't include this.

I'm new to Photon (and network play in general) and have been able to get my game to set up and play a random match via Photon, but I really don't have any idea what I'm doing with the cloud scripts. I'm trying to find an example (or tutorial) of how GetGameList should be added to my cloud script, but I'm not having much luck (if an example is included with the memory game demo project I downloaded, I'm not seeing it.) Does anyone know where a complete novice like myself can find the information to set this up?