Select the mail icon on the left side of your in-game screen, then tap on the Settings tab to open up the Setting Menu.
Selecting "Logout" will take you to the main login screen where you can select "Log in with Google". Tapping the option will bring you back to your Google Play account.
Selecting "Logout" will take you to the main login screen where you can select "Log in with Google". Tapping the option will bring you back to your Google Play account.