Better webhook auth timeouts and exception messages #1703
Previously, when using multiple auth methods, if all failed singularity would only return the message from the final one attempted. Also, the AsyncHttpClient used for webhook auth calls had all of the default timeouts and retries set, which are too high to auth calls.
This PR updates the multiple auth method caller to gather exception messages from each attempted auth method and return a combined message. It also updates the webhook auth http client to user much shorter timeouts (now defaults to 2s connect, 2s request, 2 retries) which are configurable in the auth configuration