> Here I considered your suggestion (Sami and Álvaro's). However, I haven't yet > added the links for the functions system_user(), current_user(), and session_user(). > 'm not sure how to do it. Any suggestion on how to create/add the link?
Here is an example [1] where the session information functions are referenced.
The public doc for this example is in [2].
Something similar can be done here. For example:
The session user's name; see the <function>session_user()</function> function in
<xref linkend="functions-info-session-table"/> for more details.