Today, Troy Hunt, the creator of Have I Been Pwned, announced he added the 71 million unique emails from the Naz.API dataset to his data breach notification service.
To check if your credentials are in the Naz.API dataset, you can perform a search at Have I Been Pwned. If your email is found to be associated with Naz.API, the site will warn you, indicating that your computer was infected with information-stealing malware at one point.
If you find your email listed, you should change your password and start using a Password Manager for more complex and safer passwords.
Read more at Bleeping Computer or Slashdot.