I created a Stack Overflow account with Google Signin. Sometimes I'm on another computer where I don't want to sign in to Google, but I do want to log in to my SO account. Is there any way to do that? Any way to configure my SO account so I can sign in either with Google or with a username/password?
Head over to your profile, click on My Logins & click on Add More logins.
Now, at the login page, login with another openID provider, or create a Stack Exchange account. You'll be able to login to your account using the selected openID provider or using Stack Exchange account