How to build a app that admin can post pdf and users can access it

I want to know that how can i bulid a app with two function admin and users, Admin can add direct the class note in pdf format and users can access it. And Admin can directly post pdf not any link. so plz guys give a idea.

Search the forum as there are examples of this kind of app.

i already search not find any this type app and idea.

Have you tried anything so far? or …

Use firebase database and get value and store value tags. To view the pdf use web viewer or something like that.

no i looking for some idea

i suggest you to search about upload files to hosting/drive and get the url or file id for other users to read uploaded file