Follow these steps to retrieve your Wufoo API Key needed to be provision the Wufoo Element.
To find or your API Key:
Log in to your Wufoo account
From the Form Manager, select API Information from the More dropdown on any form.
Copy your API Key. This key acts as a password to your data, so be sure to keep it private and to never give it out
If you want to reset your API key, click Reset. Note, any applications using your key will receive an authentication error once you reset your key. You will need to incorporate your new key into the code for them to continue working.
View the Wufoo API docs for more information.
Next create an instance.