Hello,
I use Unity 2017.3.0f3 with the lasted play-games-plugin-for-unity in my project.
When i want to get the player ranking or the player scoring, it gave me a log in my Android device.
I call this function in my Update().
Google play services is working and i already use to upload my score & unlock achievement.
here’s my function: https://pastebin.com/i6eCrabK