I'm testing an Alexa Voice Service integration. Quick question about "refresh_token" requests, where you trade a refresh token for an access token [https://developer.amazon.com/public/apis/engage/login-with-amazon/docs/authorization_code_grant.html]
These were working for me a while back, but then have recently started erroring:
500: {"error_description":"The server encountered an internal error trying to fulfill the request","error":"ServerError"}
I know this isn't a refresh token issue because feeding a bad token on purpose triggers
400: {"error_description":"The request has an invalid grant parameter : refresh_token","error":"invalid_grant"}
I'm pretty sure the rest of the request is formatted correctly because the "authorization_code" request still works. Anything that I should be looking into, or is this an Amazon issue?