FRP S8+ SM-G955FD Android 8.0, I have full access to menu. [Answered]

Hi, board is left by customer, I have full access to menu (for data recovery), customer left his phone but does not want to remove his account, so if I'd like to erase account it asks for email pass - how to clean it correctly. Started developer mode, OEM unlock is on now, have full access into phone's menu. TIA Seba