Does Ruby raven support auth tokens?

When I use the latest version of raven-ruby to send events to Sentry 8.21 I get errors like:

I, [2019-09-26T19:05:18.553131 #30111]  INFO -- sentry: ** [Raven] Raven 2.6.3 configured not to capture errors: No secret_key specified

Does raven support auth tokens or is there a way to generate the key pairs that ravens wants? I’ve also posted this on github.