Kaggle supports three forms of social login credentials (Google, Yahoo, Facebook), as well as an independent Kaggle username & password. Most login issues are caused if you registered with a social account but then attempt to login or reset your password using an email address. For example, if you receive this message:
"No active username/password exists for that user. Login with Google instead"
it means you need to login by clicking the "g+" icon (likewise the "f" or "y!" icons). Once logged in, you may link and unlink your social credentials from your user Profile page. If you are unable to resolve a login issue, please use the box below to give us whatever information you can remember about your account.