How to render author custom fields info on comment and node twig template?
For Node:

{{ node.getOwner.field_first_name.value }}
{{ file_url(node.getOwner.user_picture.entity.fileuri) }}
{{ node.getOwner.uid.value }}


For Comment:

{{ comment.getOwner.field_first_name.value }}
{{ file_url(comment.getOwner.user_picture.entity.fileuri) }}
{{ comment.getOwner.uid.value }}