We have a few hundred PayPal accounts that have connected to our application through the older Oauth-style system called the Permissions Service. We have tokens and tokenSecrets for all the merchants. According to the docs it says we can use a X-PP-AUTHORIZATION header with APIs hosted on https://api.paypal.com, which I think should cover the new REST APIs. I cannot get any request to be authorized using a header in the format of: X-PP-AUTHORIZATION: timestamp=1234567890,token=ABCDEFGH,signature=WXYZ I can't find anything about upgrading from older token+tokenSecret pairs to new access tokens. Is it possible to use these old credentials with the new Rest API? Is there an example somewhere that I could reference?
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