How can I get the e-mail of the user that started a custom run of a flow in the flow itself? I've tried using the

/users/{id}

and

/me

endpoints and I keep getting 404 errors.

One thought: your flow is running on a worker, right? Is the worker using a service account? Service accounts may not have the permissions to request user details (because users are an account-level API, not a workspace-level one)

I see! That's interesting. I ended up side-stepping the issue by using the

FlowRun

object's

CreatedBy.display_value

field. It's not exactly the e-mail but it's identifiable enough that it works for us.