Installing the module
Navigate to the Magento root directory in a terminal and execute the following command:
composer require creaminternet/module-postnl
Enabling the module
Navigate to the Magento root directory in a terminal and execute the following commands:
bin/magento module:enable Cream_PostNL
bin/magento setup:upgrade
bin/magento cache:flush
Additional steps
In case your shop is running in production mode, it may be necessary to redeploy static content. You can do so by executing the following command:
bin/magento setup:static-content:deploy