koobas.hobune.stream
How to sing in Google plus
Hello guys~ I am developing game on Android, IOS and I have a question. My game can sign in google plus but if user turn off game and turn on game again, user should sign in google plus again. I don't want this situation. I want to auto sign in google plus when once user sign in google plus. How can I do that? Maybe I should write user's information about Google ID at DB? but I don't have server so if I should do that I should write those at device. Doesn't have It problem to write information at device?(legal or argument etc...) And Can you explain to me how to sign in GameCenter?
