Hi,
I could get token fine (access code → access token) and used it to make Api call into Keap. However few days later, trying to get new token with the Refresh Token call and have not be able to make a successful call yet. I am using Postman to make the request.
OAuth2 Authentication - Keap Developer Portal (infusionsoft.com)
According to the document, it is just www-form body and Authentication header.(App client ID : client secret)
grant_type:refresh_token
refresh_token:eUtFWaZSvALLirAQOE3uEU4KgGVuQLkx
Getting 400 error code with this message:
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