This framework provides a Symfony bundle that will help you to use the components within your Symfony application.
If you don't use Symfony Flex, you must register the bundle and route manually.
The first steps are:
The creation of your Credential Source repository
The creation of your User Entity repository.
You may also want to configure the other options offered by the bundle. Please refer to the configuration references.
Now you have a fully configured bundle, you can protect your routes and manage the user registration and authenticatin through the Symfony Firewall.