This is a free version only. You can search any crack key but it will be illegal. You have to contact a direct Divi theme and purchase for a lifetime. You will get the Divi theme username and also the API key.
The API key and username is most important for divi theme. You can get divi theme username and API key from elegantthemes.com.
The username and API key help to update the Divi theme and for legal use.