To switch from Google or GitHub SSO to a username and password for your DigitalOcean account, go to the Profile page of your account. In the Sign-in method section, open the Change dropdown menu. Select Use email and password, then confirm the change. The next time you log in, use your email address and password.
If you originally signed up using Google SSO, reset your password after disabling Google SSO to set a password for your account.