If things like the signing key file are missing, let's just try to generate them on startup. Again, this is useful for k8s-like deployments where we just want to generate keys on the first run.
registration_shared_secret
synapse.api.auth.Auth
Requester
UserID
_check_sigs_and_hash_and_fetch
/make_knock
/messages
get_users_in_room
event_map
unpersisted_events