Suggestion/Discuss: Standardize use of direct Auth::User

[SpeedyD]

We should at some point consider to replace all (Auth::check() ? Auth::user() : null) with (Auth::user() ?? null).

Having Auth::check(), which sole purpose is to see if Auth:user() is not null, in the same line as checking Auth::user(), is not great. It would be better if we were to replace it by a singular check, which immediately gave the required result as well.

On another note, there is different kind of check, the if(Auth:check() && Auth:user()) variant- we may want to consider looking into a solution for those as well, though that is a different story entirely.

I'd like to open this issue for discussion.

[itinerare]

This is arguably one of those things that can be done whenever, since it's not a breaking change. It's also really not that dire a thing, but would be nice since it makes things a little tidier.