I get a refresh token starts with M.R3_BAY. When I use this to get access_token and send email, it throws the following error
{"error":{"code":"InvalidAuthenticationToken","message":"CompactToken parsing failed with error code: 80049217","innerError":
From reading other posts I understand that this kind of refresh_token starting with M.R3_BAY... belongs to a personal account. Is this due to client_id (belongs to a domain) and a personal account conflict?