I've looked all over the web for this one and I couldn't find anything, what am facing here is that whenever I try to unlock an achievement via the code:
Games.achievements.unlock(getApiClient(), "id");
the damn thing won't unlock ! and I have published my app on the play games and its live, the hash keys are sure to be correct because it logs into the play games, I've checked the key hash for each achievements and nothing is wrong there either, I started pulling my hair after trying:
Games.achievements.unlockImmediate();
So I came running to you guys :)