Typically structured as email:password or username:password .
If you suspect exposure, change your passwords immediately for all accounts using those credentials. 126k valid.txt
Use tools like Have I Been Pwned to see if your email appears in known "combo" leaks. Typically structured as email:password or username:password
Use multi-factor authentication (MFA) to provide a secondary layer of defense, even if your password is leaked. even if your password is leaked.