android - Google Play Games : Auth Error -

i installed google play games services on unity3d game, , functions work.

indeed, authentication goes well:

[play games plugin dll] 8/1/16 3:14:08 p.m. +02: 00 debug: starting auth transition. op: sign_in status: valid

and

[play games plugin dll] 1/8/16 3:14:08 p.m. +02: 00 debug: found user: [player: 'xxx' (id gxxxxxxxxxxxx)]

in addition, social.localuser.id function works. unfortunately, social.localuser.authenticated returns false , can not log off via playgamesplatform.instance.signout(); :

[play games plugin dll] 8/1/16 3:14:36 p.m. +02: 00 debug: starting auth transition. op: sign_out status: error_not_authorized

i know how solve problem seems odd , thank in advance.

found related issue recommends add testing gmail ids on google play developer console.

go google play developer console -> game services -> testing , add testing gmail ids.

these error happens when don't add tester tester's list in game services section of play dev console.

hope helps!