Your API credentials refer to your Username and API key on your Geonode Dashboard which are used to authenticate before starting to use the Geonode proxy. These authentication details (API Credentials) can be easily found in the Authentication details section of the Geonode Dashboard.
Login to Geonode Dashboard (https://app.geonode.com/login)
Then click on Dashboard on the left sidebar to navigate to the Authentication details section. There, we can find both the Username and API key, which are required for authentication.
NOTE - If you need a new API key, simply click on Whitelist IP on the sidebar and then click Generate new API key button to generate a new API key.