As capture the token that came through the head and send it to a function that I created myself?

Question

I'm trying to customize the Magento API Engine 2. I would like to know if there is any time of the request, before arriving at webapi.xml to capture the token that came through the head and send it to a function that I created myself? If yes, how and where can I do this?

Answer 1

I found a possibility:

use Magento\Framework\Webapi\Rest\Request;

$header = $this->request->getHeader('Authorization');