The `PHOENIX_SECRET` is used by Phoenix to sign JWTs for authentication purposes. It is not something that Railway uses directly. When authentication is enabled in Phoenix, the `PHOENIX_SECRET` is necessary for generating and validating tokens. However, if you have set up an API key and are using it correctly, traces can still be sent without issues, as the API key is used for authenticating API requests.
If you have removed `PHOENIX_SECRET` and traces are still being sent, it indicates that the API key is sufficient for your current setup. The API key is used in the `Authorization` header as a bearer token, which is essential for authenticating requests to Phoenix's APIs. For more details, you can refer to the <https://docs.arize.com/phoenix/deployment/authentication#P%3A2|Phoenix authentication setup guide>.
Would you like more detail on how `PHOENIX_SECRET` and API keys work together in Phoenix?
Sources:
- <https://docs.arize.com/phoenix/deployment/authentication#P%3A2|Phoenix authentication setup guide>
