So I have a API Key and Secret with I ran in the terminal echo -n APPIKEY:ssecret | base64....I then put that into the Authorization header to the endpoint https://idfed.constantcontact.com/as/token.oauth2?code=code&redirect_uri=https://localhost&grant_type=authorization_code in postman I set up a post to the above address with the base64 encoded API Key and secret to get the authorization key......what I get back in postman is {"error_description":"Authorization code is malformed.","error":"invalid_grant"} Unsure why....
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