How to reset the Google User Account on an Android phone without doing a “Factory Data Reset” if you need to login as another user:

Settings > Applications > Mannage applications

1. Click “Gmail” > click “Clear data”

2. Click “Gmail Storage” > click “Clear data”

3. Click “Google Apps ” > click “Clear data”

Do the above step to all the Google apps you have in the “Mannage applications” menu. Next time you open Gmail you will get the “Set up your Google account” screen and as a result you can login with another user.