Hi Ryan. I don't think it is possible to create a Kibana session using only a request header. Is it your goal to bypass the Kibana login screen? If so, you have a couple of options...
I found this post: Login kibana without UI (using token)
Which describes two options:
- Use a Single sign-on (SSO) solution
- Set up a reverse proxy in front of Kibana to handle authentication. An example: Auto-authenticating to iframe-embedded Kibana dashboard
Is this helpful, or are you ultimately trying to accomplish something else?