I am looking into using the Jenkins Configuration as Code plugin (https://jenkins.io/projects/jcasc/) for managing accounts.

However, in its current implementation, the only way to use it with a static list of usernames is by storing the passwords as plain text on disk. This is because it employs the createAccount API method:

https://github.com/jenkinsci/jenkins/blob/3b8258fd0c653854e1708f6c492d6dd1f060ee42/core/src/main/java/hudson/security/HudsonPrivateSecurityRealm.java#L501

I would like to augment this functionality so that you can create an account with a pre-hashed password such that plain text passwords do not get stored to disk.