[Owner] Send a registration/new session email.
[Session] Add verified flag.
[Session] Coerce to YAML.
[Owner] Leave creating an owner over to the controller.
[API] In addition to creating an owner also/or create a session.
[API] Confirm a session.
[API] Require a valid session to post a pod version.
[Session] Only find verified sessions by default.
[API] Only allow access with verified sessions.
[API] Rename confirm to verify.
Update TODO
[Session] Add a separate token used for verification.
[Session] Add a finder that only finds based on verification tokens.
[API] Use a verification token to enable a session.
Update push test script.