Follow the directions below to create a new Flickr Connected App.
Go to the following URL: https://www.flickr.com/services/api/misc.api_keys.html and log in to your account.
Select “Create an App”

Click “Request an API Key”

Select “Non-Commercial or Commercial” Note: you will need to apply for a Commercial Key for a Commercial App. This documentation will show a Non-Commercial App.

Input your app’s information
Click “Submit”

Copy your “Key”
Copy your “Secret”

Back in the App Garden > Apps By You: Select the newly created app

Click “Edit the authentication flow”

Select your type of app – “Web Application” will be used for this documentation
Click “Save Changes”

Next create an instance.