/**
  * Adds the required oAuth token header to make an API call to the Brightcove APIs
  *
  * @since  1.0.0
  *
  * @param boolean $force_new_token Whether or not we should obtain a fresh OAuth token for the request.
  *
  * @return string String containing oAuth token
  */
 protected function get_authorization_header($force_new_token = false)
 {
     $oauth = new BC_Oauth_API();
     $token = $oauth->_request_access_token($force_new_token);
     if (is_wp_error($token)) {
         return $token;
     }
     return 'Bearer ' . $token;
 }