20429: Too Many Requests
ERROR
Error - 20429
Your account is sending too many concurrent requests to the Twilio API. Please wait for a short period of time and make the request again, or alter your client's settings to issue fewer concurrent requests to the Twilio API.
Twilio Support can provide advice for architecting your application to avoid 429 errors. For more information, contact support.
A 429 request is never processed and is always safe to retry.