Adding "created_by" in /content/create

Hi,

in this file
./plugins/services/joomla/joomla/content.php

I added this line @ 261
$article->created_by = $app->request->params('created_by');

If I don't do that, created articles *always* are created by the api user assigned to the used token. However, this might be not the desired behaviour, so if you add this line it's possible to send the "created_by" key to set the author id properly.

If you're not passing that value, the token assigned api user will be used (as it works actually).

Sounds great!

I wasn't sure if there would be a need to uniquely define the create_by user so it wasn't included at first. Also, one needs to be careful with permissions in the regard so you don't have a "Manager" creating content on behalf of a "Super User". This is easy enough to resolve though so it can be included in the upcoming release. I just have to make sure it's properly secured.

Please also add "modified_by" field for /content/update/:id

same file, add around line 450:
if($app->request->params('modified_by')) {
$article->modified_by = $app->request->params('modified_by');
}