Google Play Services is still not working on my app

I have all credentials and APIs set up in Google Play. I have the DefauntEngine.ini configured for google play services and IAPs. (Before adding this line, I was getting the login pop up when called, but now I am not).

I have this set to run at the start of the game (on the main menu).

I originally had this set up to only run if the player was not logged in, but got the same result with either set up.

All project IDs, license keys, etc. are inputted. All permissions are set up. Why is this not working???