Only members with active Elegant Themes accounts have access to the latest versions of our products.
Getting the username:
The username can be found on this page:
Getting the API Key:
The API Key(s) can be seen / generated on this page: (make sure the button on the API key you're trying to use says "Deactivate" (that means the API key is enabled).
Simply clicking on the API Key will copy it to your clipboard and you can move to the next step and add it in your product (Divi / Extra themes or our plugins).
Note: You are free to use the same API key on multiple websites.