Configure Pixabay search

Pixabay is a high quality photo and illustration database with (generally) royalty-free images. The website has a database of hundreds of thousands of images provided by Photographers from all over the world. 
If you're a content creator who regularly needs images for blogs and articles or just like to look at high-res photography, Pixabay is for you.

To get image results from Pixabay you'll need a free account to get a free API key.
Register an account here: https://pixabay.com (Click the Join button in the top right)

Once registered and logged in, you can find your API key in the Documentation here: https://pixabay.com/api/docs/, look for the first parameter specification (looks like a list), the Key will be highlighted in green at the top of it as shown in the below screenshot. Copy this key to your config.php into the pixabay_api_key option.