Do I have to log into my Google account to use my XGIMI projector? How do l add/delete a Google account?

To complete the initial setup, please log into your Google account.
After entering the Google TV UI homepage, please follow the steps below to add/delete a Google account:
1. Press "Profile"button on remote and enter Google account page.
2. Choose "Manage accounts".
3. Choose the account you already logged.
4. Choose "remove".