Related to this thread: #24673

With this commit it's not possible anymore to use an environment parameter as name of in_memory providers. It's not really a big problem but it's a BC break when upgrading from 3.3.10 to 3.3.11. Is it wanted?

Example:

parameters:
    admin_username: '%env(ADMIN_USERNAME)%'
    admin_password: '%env(ADMIN_PASSWORD)%'

providers:
    in_memory:
        memory:
            users:
                - { name: "%admin_username%", password: "%admin_password%", roles: 'ADMIN' }

Lead to this exception:

[Symfony\Component\DependencyInjection\Exception\EnvParameterException]        
    A service name ("security.user.provider.concrete.in_memory_%env(ADMIN_USER    
    NAME)%") cannot contain dynamic values.