tips 产品官方解答：RL in sandbox is very different from LIVE. The RL limit is sandbox is global limit. The limit is
100 request in 1 min from an IP , then Block for 5min. In LIVE, we have RL based on the specific endpoints and threshold should be sufficient .
https://engineering.paypalcorp.com/confluence/display/Knowly/API+Rate+Limiting
https://paypal.atlassian.net/wiki/spaces/Knowly/pages/591274773/API+Rate+Limiting