How to Catch user id in session?

[gundogduyakici]

I will make a special report to the logged-in user. But I can not catch the id of the logged in user in sql.

[tanya]

What about $this->getContainer()->get('user');

[gundogduyakici]

How do I use it to get an id?
Could you give me an example? like this

$this->getContainer()->get('user')->id;