Hi, Streaming API Developers!
Currently, when you hit a limit of too many authentication calls made within in a limiting window, you will see an HTTP 401 (Unauthorized) response .
From June 4, we are going to change this to HTTP 429 (Too many requests), which should make the reason for the error more obvious rather than simply rejecting the call as unauthorized.
This remains an error condition, the change of value is to clarify the nature of the error. We do not anticipate that this should have a significant impact.
Let us know whether you have any questions about this change.