Added a help note about the __toString() method in User classes

[javiereguiluz]

This partially fixes #6463.

[xabbuh]

👍

Status: Reviewed

[weaverryan]

@javiereguiluz I don't think you linked the right issue. Why should we add this?

[wouterj]

@weaverryan correct issue is #6574

I'm still 👎 for the same reasons:

• You implement UserInterface, so it's never converted to a string.
• The whole concept of allowing to pass a string, UserInterface or object with __toString() is just too bad to even talk about. I'll submit a WIP PR this week to the code repository to remove this. In sort, all objects used as user just need to implement UserInterface, let's forget about the objects that can be converted to a string.

[weaverryan]

@wouterj I understand your point... in fact, I understand it so well, that I can't figure out what the bug/problem was in the original #6574 that this was fixing?

[xabbuh]

So what do you here?

[javiereguiluz]

Closing it because doc voters don't agree with it.