Create file storage through Google Services in Unity

It is a long time but it doesn’t work. The freelancer is quite good.

After doing the project, I sent him to the customer for tests, and I expected there would be some directions,
But, after some manipulations by the customer (i.e. the download of the project to Google Play), the right none followed. I thought he was all right, and I just waited for him to check it all. The client simply extended and extended the project. As far as I understood, he had no right to use Google Play Cloud (to keep the game data in the cloud). In general, I was ready to put the directions, but I did not follow any directions in this regard.
I recommend it better to write tz, and don't hesitate to write about rectum or installation help.