how to unlink google account from oneplus two without access to the phone I just have sold oneplus 2, unfortunately I have used my email account on it. before sale I have wiped all the data and formatted device through recovery but I just got a call from a buyer that my account is still linked to the phone and he cannot use it. is there any way to unlink it without meeting him? 
I dont want to send him my pass/one time code.

regards
it's like explained here


  Go to Google's security manager page, find the phone you logged in on and click "deauthorize".