security: 
    encoders: 
        # this internal class is used by Symfony to represent in-memory users
        Symfony\Component\Security\Core\User\User: 'plaintext'

    # https://symfony.com/doc/current/security.html#b-configuring-how-users-are-loaded
    providers: 
        chain_provider: 
            chain: 
                providers: [ezpublish, in_memory]
        ezpublish: 
            id: ezpublish.security.user_provider
        in_memory: 
            memory: 
                users: 
                    example: { password: 'password', roles: ['ROLE_ADMIN'] }