Helper/Config.php
public function getCallbackUrl()
    {
        if ($callback = $this->scopeConfig->getValue(self::XML_PATH_CONNECTOR_CUSTOM_AUTHORIZATION)) {
            return $callback;
        }

        return $this->storeManager->getStore()->getBaseUrl(
            \Magento\Framework\UrlInterface::URL_TYPE_WEB,
            true
        );
    }
public function getCallbackUrl()
    {
        if ($callback = $this->scopeConfig->getValue(self::XML_PATH_CONNECTOR_CUSTOM_AUTHORIZATION)) {
            return $callback;
        }

        return $this->storeManager->getStore()->getBaseUrl(
            \Magento\Framework\UrlInterface::URL_TYPE_WEB,
            true
        );
    }
public function getCallbackUrl ( ) { if ( $ callback = $ this -> scopeConfig -> getValue ( self :: XML_PATH_CONNECTOR_CUSTOM_AUTHORIZATION ) ) { return $ callback ; } return $ this -> storeManager -> getStore ( ) -> getBaseUrl ( \ Magento \ Framework \ UrlInterface :: URL_TYPE_WEB , true ) ; }
Callback authorization url.

@return string
Callback authorization url .