[9.x] Adds Eloquent User Provider query handler

[DarkGhostHunter]

What

Allows the user to register a query handler for retrieving the user from the EloquentUserProvider. This allows to tap into the query and modify columns to retrieve, like bypassing columns that may have too much data or are unused.

Auth::guard('web')->getProvider()->setQueryHandler(function ($query) {
    // ...
});

Since it works a newModelQuery() level, any change be overridden through callbacks when retrieving the user.

Auth::guard('web')->attempt([
    'email' => $email,
    'password' => $password,
    fn($query) => ...
});

Also the setQueryHandler() can be used to erase it with null and it can be retrieved for further inspection (or even wrapping).

[taylorotwell]

Why did you need this in your application?

[DarkGhostHunter]

Why did you need this in your application?

I cannot alter which columns to retrieve from the table, or even use eloquent relations, without also altering all other queries in the app.

For example, I hooked a Laravel app into an existing DB where someone decided it was a good idea to have an embedded image in a column users table.

Since I cannot remove it, or move it, my only chance is to tell the User Provider to not load a column that contains 2~5 mb of data.

Another alternative is to extend the User Provider but feels so hacky...