Symfony4 - Basic Auth looping while using DB provider - database

Question

I'm desperate : I'm using Symfony for years, and today I'm stuck on a basic stuff. As FOSUserBundle is not implemented for Sf4 yet, I decided to create a really basic User entity in DB to load user.
But when I enter my username/password in the BasicAuth windows in my web browser (chrome) it's not logging me and loops over and over.
Here is my security file :
security:
encoders:
App\Entity\User:
algorithm: bcrypt
providers:
native_provider:
entity:
class: App\Entity\User
property: username
manager_name: native_users
firewalls:
main:
pattern: ^/
http_basic: ~
provider: native_provider
access_control:
- { path: ^/, roles: ROLE_USER }
role_hierarchy:
ROLE_ADMIN: ROLE_USER
And my User class is exactly the same as the one in the symfony example : https://symfony.com/doc/current/security/entity_provider.html#create-your-user-entity
Finally I created some User fixtures using [nelmio/alice][1] :
App\Entity\User:
user_1:
id: '<uuid()>'
username: 'admin'
password: '\$2y\$10\$574w3EitCqOaHmhu4ER49.KPG2EMtcQlYrO0vdPyYW/EuqTHMCB0C'
email: 'admin#test.com'
isActive: true
Where '\$2y\$10\$574w3EitCqOaHmhu4ER49.KPG2EMtcQlYrO0vdPyYW/EuqTHMCB0C' reprensent the "admin" word coded in bcrypt.
Despite all these things, basic auth won't work.
Any Idea ?
Thanks !