Call custom REST API from after_save hook

Hi! I'm new to Sugar and I don't know hot to call a custom rest api from a hook in a custom module.

I added the custom rest endpoint to custom module in sugar, I created the after_save hook class and method, but now I'm stacked to how to call the api from the hook.

My code for the API is: 

<?php

class GetOdinNameApi extends SugarApi {
   public function registerApiRest() {
      return array(
            'getOdinName' => array(
            'reqType' => 'GET',
            'path' => array('<custom_module>', '?', 'acc_id'),
            'pathVars' => array('', 'id'),
            'method' => 'getOdinName',
            'shortHelp' => 'Get a record in custom module',
            'longHelp' => '',
)
);
}
function getOdinName($api, $args)
{

return 'something';
}

}

I'm using sugar 7.8.

Thanks for help.

Annamaria