Head over to https://www.flickr.com/services/apps/create/ and request an API key. Once your request is approved, you have an API Key and an API Secret and can continue in Event Gallery.

You now have an API Key and the API secret. Let’s use them. Open the Flickr Accounts section in the Event Gallery back end and hit the NEW button. This will open a page where you can create/edit your Flickr Account.

There are several fields you need to fill in. Start with the name and description. They will help you remember what this account is for. Now enter the API key. The next steps depend on what you plan to do. I will start with the most convenient way.

Full Power

The benefits of this method: automatic User ID selection and access to your private photos. For this, you need to enter the API secret in addition to the API Key and hit the SAVE button. If your API credentials are valid, you’ll see an Authorize button. Use it to authorize your Flickr Application to access your images. When you are back on your Joomla site, the Auth token, Auth secret and User ID fields are filled in. You’re done with that account.

Limited Access

I don’t recommend this method, but you can still use it. You have already entered the API key. Now grab the UserID manually from the right column on https://www.flickr.com/services/api/explore/flickr.photosets.getPhotos and hit the SAVE button. You can use this account to access the public photos of the user you selected.

Built-In API Key

If you don’t specify an API key, there is a built-in API key which might work. Don’t rely on this. Using this key, you don’t need to add a Flickr Account, but this method might break at any time. Good for a quick test, but not for production. If you create a Flickr Account, it is enough to add the User ID only, which you can find in the right column: https://www.flickr.com/services/api/explore/flickr.photosets.getPhotos