To Connect Pixabay API you need to get your Pixabay API Key first.
You can create a Free Pixabay account or login to your existing account and go to your Pixabay API Documentation page following below steps:
1. Go to pixabay.com and create and/or login to your Pixabay account.
2. On your Pixabay account in the bottom of your Dashboard click on API.
3. Click the green button which says Get Started View API Documentations.
5. Scroll Down and below Parameters you will find your Pixabay API Key next to key.
To Connect API:
Copy this API Key, open up your Explaindio Elements software, go to Settings and paste the API Key where it says Pixabay Key. Close Settings and restart your Explaindio Elements software.