Get the benefits of Closed Loop Marketing in your marketing analytics 
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You will also want to create a file called supa_secret.py to hold your
encryption key. You can name your key 'secret_key' if you want this
code to run out of the box.

If you do not include a supa_secret.py file that has an encryption key
of the correct length (16, 24, or 32 characters), the cookie string that gets set
will be base64 encoded, but not encrypted. Don't let this happen to you!