Use new authentication and hashing system

config/packages/security.yaml

@@ -1,6 +1,11 @@
 security:
-    encoders:
+    enable_authenticator_manager: true
+
+    password_hashers:
+        # use your user class name here
         App\Entity\User:
+            # Use native password hasher, which auto-selects the best
+            # possible hashing algorithm (starting from Symfony 5.3 this is "bcrypt")
             algorithm: auto
 
     # https://symfony.com/doc/current/security.html#where-do-users-come-from-user-providers
@@ -15,7 +20,6 @@ security:
             pattern: ^/(_(profiler|wdt)|css|images|js)/
             security: false
         main:
-            anonymous: true
             lazy: true
             provider: app_user_provider
             guard: