Get Refresh Token Error invalid Token

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Description
When running the Get Refresh Token API call in order to get a new access token the call returns an error indicating an invalid token or expired token. I don’t understand why this would be as the API documentation on Oauth state the Refresh Token is valid for 15 years.

I am only running the call once the access token has expired.

Hey @boston85719,

Can you confirm that you’re using the refresh_token that was originally returned with the access_token initially? Each time you request a new access_token, you’ll get a new refresh_token as well, and you’ll need to ensure you’re using the latest refresh_token each time.

Let me know—thanks!
Will