Question about authorId when making annotations

[system]

Hello, I’m Ron, an automated tech support bot

While you wait for one of our customer support representatives to get back to you, please check out some of these documentation pages:

Guides:

• Customize display authors for annotations - Map a userId to a Display Author
• Annotation permissions - Default behavior
• PDF collaboration with PDF.js Express

APIs:

• CoreControls.AnnotationManager - getDisplayAuthor(annotation)
• Core.Annotations.CustomAnnotation - new CustomAnnotation(type [, initializer])
• Core.Annotations.RedactionAnnotation - new RedactionAnnotation( [options])

Forums:

• Old data to be extract from XFDF file and to store in firebase | Real Time Collaboration
• Unable to save the transparency to fillColor
• Can I work with my database or other approaches for real-time annotation instead of firebase?