Pendo Sample Integration key
The Pendo V1 API Documentation states:
A sample integration key is included in all of the read-only examples so you can test any of them right away. When you’re ready to test requests against your own subscription, simply replace the sample key with your actual integration key.
I do not see an sample integration key in any of the samples below this. Is this key a thing or do you need a paid account to test the API?