Expected Behaviour

It's a common case that one wants to create a system user and deploy it to all the environments with a package.

I should be able to define system users in the ui.content module.

Actual Behaviour

After adding nodes containing system users, the build fails with errors

Reproduce Scenario (including but not limited to)

Generate project with the latest archetype e.g:
mvn -B archetype:generate -D archetypeGroupId=com.adobe.aem -D archetypeArtifactId=aem-project-archetype -D archetypeVersion=27 -D aemVersion=6.5.7 -D appTitle='my app' -D appId=platform -D groupId=my.app -D includeExamples=n

Inside the ui.content package add a system user node e.g.

<jcr:root xmlns:jcr="http://www.jcp.org/jcr/1.0" xmlns:rep="internal"
jcr:primaryType="rep:SystemUser"
jcr:uuid="2018c732-1e79-3c1e-88b3-de3ce2ceee41"
rep:authorizableId="dam-writer-service"
rep:principalName="dam-writer-service"/>

Logs taken while reproducing problem

[ERROR] ValidationViolation: "jackrabbit-nodetypes: Property 'rep:authorizableId' [String] is not allowed in node with types [rep:SystemUser]: Property is protected!", filePath=jcr_root/home/users/system//.content.xml, nodePath=/home/users/system/, line=6, column=42
[ERROR] ValidationViolation: "jackrabbit-nodetypes: Property 'rep:principalName' [String] is not allowed in node with types [rep:SystemUser]: Property is protected!", filePath=jcr_root/home/users/system//.content.xml, nodePath=/home/users/system/, line=6, column=42