Hi,
First of all please do not paste the OAuth details as it can be sensitive.
Generally we do not recommend using the “synchronous” analytics endpoint with a large # of entities and metric groups. Your success rate may go up to limit this to 5 or 10 at maximum.
Finally fetching data with larger amounts is generally much easier with the “async” method. You can find example of how to call and download the data within our SDKs, but the overall explanation of differences may be found here: https://dev.twitter.com/ads/analytics